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General homologyHomology Ho*mol"o*gy, n. [Gr. ? agreement. See Homologous.]
1. The quality of being homologous; correspondence; relation;
as, the homologyof similar polygons.
2. (Biol.) Correspondence or relation in type of structure in
contradistinction to similarity of function; as, the
relation in structure between the leg and arm of a man; or
that between the arm of a man, the fore leg of a horse,
the wing of a bird, and the fin of a fish, all these
organs being modifications of one type of structure.
Note: Homology indicates genetic relationship, and according
to Haeckel special homology should be defined in terms
of identity of embryonic origin. See Homotypy, and
Homogeny.
3. (Chem.) The correspondence or resemblance of substances
belonging to the same type or series; a similarity of
composition varying by a small, regular difference, and
usually attended by a regular variation in physical
properties; as, there is an homology between methane,
CH4, ethane, C2H6, propane, C3H8, etc., all members
of the paraffin series. In an extended sense, the term is
applied to the relation between chemical elements of the
same group; as, chlorine, bromine, and iodine are said to
be in homology with each other. Cf. Heterology.
General homology (Biol.), the higher relation which a
series of parts, or a single part, bears to the
fundamental or general type on which the group is
constituted. --Owen.
Serial homology (Biol.), representative or repetitive
relation in the segments of the same organism, -- as in
the lobster, where the parts follow each other in a
straight line or series. --Owen. See Homotypy.
Special homology (Biol.), the correspondence of a part or
organ with those of a different animal, as determined by
relative position and connection. --Owen. HomologateHomologate Ho*mol"o*gate, v. t. [imp. & p. p. Homologated;
p. pr. & vb. n. Homologating.] [LL. homologatus, p. p. of
homologare to homologate; Gr. ? to assent, agree. See
Homologous.] (Civ. Law)
To approve; to allow; to confirm; as, the court homologates a
proceeding. --Wheaton. HomologatedHomologate Ho*mol"o*gate, v. t. [imp. & p. p. Homologated;
p. pr. & vb. n. Homologating.] [LL. homologatus, p. p. of
homologare to homologate; Gr. ? to assent, agree. See
Homologous.] (Civ. Law)
To approve; to allow; to confirm; as, the court homologates a
proceeding. --Wheaton. HomologatingHomologate Ho*mol"o*gate, v. t. [imp. & p. p. Homologated;
p. pr. & vb. n. Homologating.] [LL. homologatus, p. p. of
homologare to homologate; Gr. ? to assent, agree. See
Homologous.] (Civ. Law)
To approve; to allow; to confirm; as, the court homologates a
proceeding. --Wheaton. Homologation
Homologation Ho*mol`o*ga"tion, n. [Cf. F. homologation.] (Civ.
& Scots Law)
Confirmation or ratification (as of something otherwise null
and void), by a court or a grantor.
HomologicalHomological Ho`mo*log"ic*al, a.
Pertaining to homology; having a structural affinity
proceeding from, or base upon, that kind of relation termed
homology. -- Ho`mo*log"ic*al*ly, adv. HomologicallyHomological Ho`mo*log"ic*al, a.
Pertaining to homology; having a structural affinity
proceeding from, or base upon, that kind of relation termed
homology. -- Ho`mo*log"ic*al*ly, adv. Homologinic
Homologinic Ho*mol`o*gin"ic, a. (Chem.)
Pertaining to, or characterized by, homology; as, homologinic
qualities, or differences.
Homologize
Homologize Ho*mol"o*gize, v. t. (Biol.)
To determine the homologies or structural relations of.
HomologonHomologon Ho*mol"o*gon, n. [NL.]
See Homologue. HomologoumenaHomologoumena Hom`o*lo*gou"me*na, n. pl. [NL., fr. Gr. ?
things conceded, p. p. of ? to agree, admit, concede. See
Homologous.]
Those books of the New Testament which were acknowledged as
canonical by the early church; -- distinguished from
antilegomena. HomologousHomologous Ho*mol"o*gous, a. [Gr. ? assenting, agreeing; ? the
same + ? speech, discourse, proportion, ? to say, speak.]
Having the same relative position, proportion, value, or
structure. Especially:
(a) (Geom.) Corresponding in relative position and
proportion.
In similar polygons, the corresponding sides,
angles, diagonals, etc., are homologous. --Davies &
Peck (Math.
Dict.).
(b) (Alg.) Having the same relative proportion or value, as
the two antecedents or the two consequents of a
proportion.
(c) (Chem.) Characterized by homology; belonging to the same
type or series; corresponding in composition and
properties. See Homology, 3.
(d) (Biol.) Being of the same typical structure; having like
relations to a fundamental type to structure; as, those
bones in the hand of man and the fore foot of a horse are
homologous that correspond in their structural relations,
that is, in their relations to the type structure of the
fore limb in vertebrates.
Homologous stimulus. (Physiol.) See under Stimulus. Homologous stimuliStimulus Stim"u*lus, n.; pl. Stimuli. [L., for stigmulus,
akin to L. instigare to stimulate. See Instigare, Stick,
v. t.]
1. A goad; hence, something that rouses the mind or spirits;
an incentive; as, the hope of gain is a powerful stimulus
to labor and action.
2. That which excites or produces a temporary increase of
vital action, either in the whole organism or in any of
its parts; especially (Physiol.), any substance or agent
capable of evoking the activity of a nerve or irritable
muscle, or capable of producing an impression upon a
sensory organ or more particularly upon its specific end
organ.
Note: Of the stimuli applied to the sensory apparatus,
physiologists distinguish two kinds: (a) Homologous
stimuli, which act only upon the end organ, and for
whose action the sense organs are especially adapted,
as the rods and cones of the retina for the vibrations
of the either. (b) Heterologous stimuli, which are
mechanical, chemical, electrical, etc., and act upon
the nervous elements of the sensory apparatus along
their entire course, producing, for example, the flash
of light beheld when the eye is struck. --Landois &
Stirling. Homologous stimulusHomologous Ho*mol"o*gous, a. [Gr. ? assenting, agreeing; ? the
same + ? speech, discourse, proportion, ? to say, speak.]
Having the same relative position, proportion, value, or
structure. Especially:
(a) (Geom.) Corresponding in relative position and
proportion.
In similar polygons, the corresponding sides,
angles, diagonals, etc., are homologous. --Davies &
Peck (Math.
Dict.).
(b) (Alg.) Having the same relative proportion or value, as
the two antecedents or the two consequents of a
proportion.
(c) (Chem.) Characterized by homology; belonging to the same
type or series; corresponding in composition and
properties. See Homology, 3.
(d) (Biol.) Being of the same typical structure; having like
relations to a fundamental type to structure; as, those
bones in the hand of man and the fore foot of a horse are
homologous that correspond in their structural relations,
that is, in their relations to the type structure of the
fore limb in vertebrates.
Homologous stimulus. (Physiol.) See under Stimulus. HomolographicHomolographic Hom`o*lo*graph"ic, a. [Homo- + Gr. "o`los whole
+ -graph + -ic; but cf. F. homalographique, Gr. ? even,
level.]
Preserving the mutual relations of parts, especially as to
size and form; maintaining relative proportion.
Homolographic projection, a method of constructing
geographical charts or maps, so that the surfaces, as
delineated on a plane, have the same relative size as the
real surfaces; that is, so that the relative actual areas
of the different countries are accurately represented by
the corresponding portions of the map. Homolographic projectionHomolographic Hom`o*lo*graph"ic, a. [Homo- + Gr. "o`los whole
+ -graph + -ic; but cf. F. homalographique, Gr. ? even,
level.]
Preserving the mutual relations of parts, especially as to
size and form; maintaining relative proportion.
Homolographic projection, a method of constructing
geographical charts or maps, so that the surfaces, as
delineated on a plane, have the same relative size as the
real surfaces; that is, so that the relative actual areas
of the different countries are accurately represented by
the corresponding portions of the map. HomologueHomologue Hom"o*logue, n. [Cf. F. homologue. See
Homologous.]
That which is homologous to something else; as, the
corresponding sides, etc., of similar polygons are the
homologues of each other; the members or terms of an
homologous series in chemistry are the homologues of each
other; one of the bones in the hand of man is the homologue
of that in the paddle of a whale. HomologyHomology Ho*mol"o*gy, n. [Gr. ? agreement. See Homologous.]
1. The quality of being homologous; correspondence; relation;
as, the homologyof similar polygons.
2. (Biol.) Correspondence or relation in type of structure in
contradistinction to similarity of function; as, the
relation in structure between the leg and arm of a man; or
that between the arm of a man, the fore leg of a horse,
the wing of a bird, and the fin of a fish, all these
organs being modifications of one type of structure.
Note: Homology indicates genetic relationship, and according
to Haeckel special homology should be defined in terms
of identity of embryonic origin. See Homotypy, and
Homogeny.
3. (Chem.) The correspondence or resemblance of substances
belonging to the same type or series; a similarity of
composition varying by a small, regular difference, and
usually attended by a regular variation in physical
properties; as, there is an homology between methane,
CH4, ethane, C2H6, propane, C3H8, etc., all members
of the paraffin series. In an extended sense, the term is
applied to the relation between chemical elements of the
same group; as, chlorine, bromine, and iodine are said to
be in homology with each other. Cf. Heterology.
General homology (Biol.), the higher relation which a
series of parts, or a single part, bears to the
fundamental or general type on which the group is
constituted. --Owen.
Serial homology (Biol.), representative or repetitive
relation in the segments of the same organism, -- as in
the lobster, where the parts follow each other in a
straight line or series. --Owen. See Homotypy.
Special homology (Biol.), the correspondence of a part or
organ with those of a different animal, as determined by
relative position and connection. --Owen. Serial homologySerial Se"ri*al, a.
1. Of or pertaining to a series; consisting of a series;
appearing in successive parts or numbers; as, a serial
work or publication. ``Classification . . . may be more or
less serial.' --H. Spencer.
2. (Bot.) Of or pertaining to rows. --Gray.
Serial homology. (Biol.) See under Homology.
Serial symmetry. (Biol.) See under Symmetry. Serial homologyHomology Ho*mol"o*gy, n. [Gr. ? agreement. See Homologous.]
1. The quality of being homologous; correspondence; relation;
as, the homologyof similar polygons.
2. (Biol.) Correspondence or relation in type of structure in
contradistinction to similarity of function; as, the
relation in structure between the leg and arm of a man; or
that between the arm of a man, the fore leg of a horse,
the wing of a bird, and the fin of a fish, all these
organs being modifications of one type of structure.
Note: Homology indicates genetic relationship, and according
to Haeckel special homology should be defined in terms
of identity of embryonic origin. See Homotypy, and
Homogeny.
3. (Chem.) The correspondence or resemblance of substances
belonging to the same type or series; a similarity of
composition varying by a small, regular difference, and
usually attended by a regular variation in physical
properties; as, there is an homology between methane,
CH4, ethane, C2H6, propane, C3H8, etc., all members
of the paraffin series. In an extended sense, the term is
applied to the relation between chemical elements of the
same group; as, chlorine, bromine, and iodine are said to
be in homology with each other. Cf. Heterology.
General homology (Biol.), the higher relation which a
series of parts, or a single part, bears to the
fundamental or general type on which the group is
constituted. --Owen.
Serial homology (Biol.), representative or repetitive
relation in the segments of the same organism, -- as in
the lobster, where the parts follow each other in a
straight line or series. --Owen. See Homotypy.
Special homology (Biol.), the correspondence of a part or
organ with those of a different animal, as determined by
relative position and connection. --Owen. Special homologyHomology Ho*mol"o*gy, n. [Gr. ? agreement. See Homologous.]
1. The quality of being homologous; correspondence; relation;
as, the homologyof similar polygons.
2. (Biol.) Correspondence or relation in type of structure in
contradistinction to similarity of function; as, the
relation in structure between the leg and arm of a man; or
that between the arm of a man, the fore leg of a horse,
the wing of a bird, and the fin of a fish, all these
organs being modifications of one type of structure.
Note: Homology indicates genetic relationship, and according
to Haeckel special homology should be defined in terms
of identity of embryonic origin. See Homotypy, and
Homogeny.
3. (Chem.) The correspondence or resemblance of substances
belonging to the same type or series; a similarity of
composition varying by a small, regular difference, and
usually attended by a regular variation in physical
properties; as, there is an homology between methane,
CH4, ethane, C2H6, propane, C3H8, etc., all members
of the paraffin series. In an extended sense, the term is
applied to the relation between chemical elements of the
same group; as, chlorine, bromine, and iodine are said to
be in homology with each other. Cf. Heterology.
General homology (Biol.), the higher relation which a
series of parts, or a single part, bears to the
fundamental or general type on which the group is
constituted. --Owen.
Serial homology (Biol.), representative or repetitive
relation in the segments of the same organism, -- as in
the lobster, where the parts follow each other in a
straight line or series. --Owen. See Homotypy.
Special homology (Biol.), the correspondence of a part or
organ with those of a different animal, as determined by
relative position and connection. --Owen.
Meaning of HOMOLOG from wikipedia
