Definition of Conjugate diameters. Meaning of Conjugate diameters. Synonyms of Conjugate diameters
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Definition of Conjugate diameters
Conjugate diameters Diameter Di*am"e*ter, n. [F. diam[`e]tre, L. diametros, fr.
Gr. ?; dia` through + ? measure. See Meter.]
1. (Geom.)
(a) Any right line passing through the center of a figure
or body, as a circle, conic section, sphere, cube,
etc., and terminated by the opposite boundaries; a
straight line which bisects a system of parallel
chords drawn in a curve.
(b) A diametral plane.
2. The length of a straight line through the center of an
object from side to side; width; thickness; as, the
diameter of a tree or rock.
Note: In an elongated object the diameter is usually taken at
right angles to the longer axis.
3. (Arch.) The distance through the lower part of the shaft
of a column, used as a standard measure for all parts of
the order. See Module.
Conjugate diameters. See under Conjugate.
Conjugate diameters Conjugate Con"ju*gate, a. [L. conjugatus, p. p. or conjugare
to unite; con- + jugare to join, yoke, marry, jugum yoke;
akin to jungere to join. See Join.]
1. United in pairs; yoked together; coupled.
2. (Bot.) In single pairs; coupled.
3. (Chem.) Containing two or more radicals supposed to act
the part of a single one. [R.]
4. (Gram.) Agreeing in derivation and radical signification;
-- said of words.
5. (Math.) Presenting themselves simultaneously and having
reciprocal properties; -- frequently used in pure and
applied mathematics with reference to two quantities,
points, lines, axes, curves, etc.
Conjugate axis of a hyperbola (Math.), the line through the
center of the curve, perpendicular to the line through the
two foci.
Conjugate diameters (Conic Sections), two diameters of an
ellipse or hyperbola such that each bisects all chords
drawn parallel to the other.
Conjugate focus (Opt.) See under Focus.
Conjugate mirrors (Optics), two mirrors so placed that rays
from the focus of one are received at the focus of the
other, especially two concave mirrors so placed that rays
proceeding from the principal focus of one and reflected
in a parallel beam are received upon the other and brought
to the principal focus.
Conjugate point (Geom.), an acnode. See Acnode, and
Double point.
Self-conjugate triangle (Conic Sections), a triangle each
of whose vertices is the pole of the opposite side with
reference to a conic.
