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D polymorphaDreissena Dreis"se*na, n. [NL. Named after Dreyssen, a Belgian
physician.] (Zo["o]l.)
A genus of bivalve shells of which one species (D.
polymorpha) is often so abundant as to be very troublesome
in the fresh waters of Europe. Marchantia polymorphaLiverwort Liv"er*wort`, n. (Bot.)
1. A ranunculaceous plant (Anemone Hepatica) with pretty
white or bluish flowers and a three-lobed leaf; -- called
also squirrel cups.
2. A flowerless plant (Marchantia polymorpha), having an
irregularly lobed, spreading, and forking frond.
Note: From this plant many others of the same order
(Hepatic[ae]) have been vaguely called liverworts,
esp. those of the tribe Marchantiace[ae]. See Illust.
of Hepatica. Polymastism
Polymastism Pol`y*mas"tism, n. [Poly- + Gr. ? a breast.]
(Anat.)
The condition of having more than two mamm[ae], or breasts.
PolymathicPolymathic Pol`y*math"ic, a. [Cf. F. polymathique. See
Polymathy.]
Pertaining to polymathy; acquainted with many branches of
learning. Polymathist
Polymathist Po*lym"a*thist, n.
One versed in many sciences; a person of various learning.
Polymathy
Polymathy Po*lym"a*thy, n. [Gr. ?; poly`s much + ?, ?, to
learn.]
The knowledge of many arts and sciences; variety of learning.
--Johnson.
PolymeniscousPolymeniscous Pol`y*me*nis"cous, a. [See Poly-, and
Meniscus.] (Zo["o]l.)
Having numerous facets; -- said of the compound eyes of
insects and crustaceans. PolymerPolymer Pol"y*mer, n. [See Polymeric.] (Chem.)
Any one of two or more substances related to each other by
polymerism; specifically, a substance produced from another
substance by chemical polymerization. [Formerly also written
polymere.] PolymericPolymeric Pol`y*mer"ic, a. [Poly- + Gr. ? part.] (Chem.)
Having the same percentage composition (that is, having the
same elements united in the same proportion by weight), but
different molecular weights; -- often used with with; thus,
cyanic acid (CNOH), fulminic acid (C2N2O2H2), and
cyanuric acid (C3N3O3H3), are polymeric with each other.
Note: The figures expressing the number of atoms of each
element in a number of polymeric substances are
respectively multiples and factors of each other, or
have some simple common divisor. The relation may be
merely a numerical one, as in the example given above,
or a chemical one, as in the case of aldehyde,
paraldehyde, and metaldehyde. Polymerism
Polymerism Po*lym"er*ism, n. (Chem.)
(a) The state, quality, or relation of two or more polymeric
substances.
(b) The act or process of forming polymers.
Polymerization
Polymerization Pol`y*mer`i*za"tion, n. (Chem.)
The act or process of changing to a polymeric form; the
condition resulting from such change.
Polymerize
Polymerize Pol"y*mer*ize, v. t. (Chem.)
To cause polymerization of; to produce polymers from; to
increase the molecular weight of, without changing the atomic
proportions; thus, certain acids polymerize aldehyde.
Polymerize
Polymerize Pol"y*mer*ize, v. i. (Chem.)
To change into another substance having the same atomic
proportions, but a higher molecular weight; to undergo
polymerization; thus, aldehyde polymerizes in forming
paraldehyde.
Polymerous
Polymerous Po*lym"er*ous, a.
1. (Bot.) Having many parts or members in each set. --Gray.
2. (Chem.) Polymeric. [Obs.]
Polymnia UvedaliaLeafcup Leaf"cup`, n. (Bot.)
A coarse American composite weed (Polymnia Uvedalia). Polymnite
Polymnite Pol"ym*nite, n. [Gr. ? full of moss; poly`s much + ?
moss.] (Min.)
A stone marked with dendrites and black lines, and so
disposed as to represent rivers, marshes, etc.
PolymorphPolymorph Pol"y*morph, n. [Gr. ? multiform; poly`s many + ?
form: cf. F. polymorphe.] (Crystallog.)
A substance capable of crystallizing in several distinct
forms; also, any one of these forms. Cf. Allomorph. Polymorphic
Polymorphic Pol`y*mor"phic, a.
Polymorphous.
PolymorphismPolymorphism Pol`y*mor"phism, n.
1. (Crystallog.) Same as Pleomorphism.
2. (Biol.)
(a) The capability of assuming different forms; the
capability of widely varying in form.
(b) Existence in many forms; the coexistence, in the same
locality, of two or more distinct forms independent of
sex, not connected by intermediate gradations, but
produced from common parents. PolymorphosisPolymorphosis Pol`y*mor*pho"sis, n. [NL. See Poly-, and
Morphosis.] (Zo["o]l.)
The assumption of several structural forms without a
corresponding difference in function; -- said of sponges,
etc. Polymorphous
Polymorphous Pol`y*mor"phous, a.
1. Having, or assuming, a variety of forms, characters, or
styles; as, a polymorphous author. --De Quincey.
2. (Biol.) Having, or occurring in, several distinct forms;
-- opposed to monomorphic.
Polymorphy
Polymorphy Pol"y*mor`phy, n.
Existence in many forms; polymorphism.
PolymyodaePolymyodae Pol`y*my"o*d[ae], n. pl. [NL. See Polymyoid.]
(Zo["o]l.)
Same as Oscines. Polymyodous
Polymyodous Pol`y*my"o*dous, a. (Zo["o]l.)
Polymyoid.
Polymyoid
Polymyoid Po*lym"y*oid, a. [Poly- + Gr. ?, ?, muscle + -oid.]
(Zo["o]l.)
Having numerous vocal muscles; of or pertaining to the
Polymyod[ae].
Meaning of Polym from wikipedia
