(Pol`y*cot`y*le"don) n. [Poly- + cotyledon: cf. F. polycotylédone.] (Bot.) A plant that has
many, or more than two, cotyledons in the seed. Pol`y*cot`y*led"on*ous a.
(Pol`y*cot`y*led"on*a*ry) a. [Poly- + cotyledonary.] (Anat.) Having the villi of the
placenta collected into definite patches, or cotyledons.
(Po*lyc"ra*cy) n. [Poly- + -cracy, as in democracy.] Government by many rulers; polyarchy.
(Pol`y*crot"ic) a. [Poly- + Gr. krotei^n to beat.] (Physiol.) Of or pertaining to polycrotism; manifesting
polycrotism; as, a polycrotic pulse; a polycrotic pulse curve.
(Po*lyc"ro*tism) n. (Physiol.) That state or condition of the pulse in which the pulse curve,
or sphygmogram, shows several secondary crests or elevations; contrasted with monocrotism and
(Pol`y*cys"tid) n. (Zoöl.) (a) One of the Polycystidea. (b) One of the Polycystina. a.
Pertaining to the Polycystidea, or the Polycystina.
(||Pol`y*cys*tid"e*a) n. pl. [NL. See Poly-, and Cystidea.] (Zoöl.) A division of Gregarinæ
including those that have two or more internal divisions of the body.
(||Pol`y*cys*ti"na) n. pl. [NL. See Poly-, and Cyst.] (Zoöl.) A division of Radiolaria including
numerous minute marine species. The skeleton is composed of silica, and is often very elegant in form
and sculpture. Many have been found in the fossil state.
(Pol`y*cys"tine) a. (Zoöl.) Pertaining to the Polycystina. n. One of the Polycystina.
(||Pol`y*cyt*ta"ri*a) n. pl. [NL., fr. Gr. poly`s many + dim. fr. a hollow vessel.] (Zoöl.) A
division of Radiolaria. It includes those having one more central capsules.
(Pol`y*dac"tyl*ism) n. [Poly- + Gr. finger: cf. F. polydactylisme.] (Anat.) The possession
of more that the normal number of digits.
(||Pol`y*dip"si*a) n. [NL., fr. Gr. poly`s much + thirst.] (Med.) Excessive and constant thirst
occasioned by disease.
(Pol`y*e"dron) n. See Polyhedron.
(Pol`y*e"drous) a. See Polyhedral.
(Pol`y*ei"dic) a. [Poly- + Gr. form.] (Zoöl.) Passing through several distinct larval forms;
having several distinct kinds of young.