Part 390

Pol`y*bro"mide (?), n. [Poly- + bromide.] (Chem.) A bromide containing more than one atom of bromine in the molecule.

Pol`y*car"pel*la*ry (?), a. (Bot.) Composed of several or numerous carpels; -- said of such fruits as the orange.

{ Pol`y*car"pic (?), Pol`y*car"pous (?), } a. [Poly- + Gr. &?; fruit.] (Bot.) (a) Bearing fruit repeatedly, or year after year. (b) Having several pistils in one flower.

||Pol`y*chÊ"ta (?), n. pl. [NL., from Gr. poly`s many + &?; hair.] ||(Zoˆl.) One of the two principal groups of ChÊtopoda. It includes ||those that have prominent parapodia and fascicles of setÊ. See ||Illust. under Parapodia.

Pol`y*chlo"ride (?), n. [Poly- + chloride.] (Chem.) A chloride containing more than one atom of chlorine in the molecule.

Pol`y*chúr"a*ny (?), n. [Gr. &?;, fr. &?; wide-ruling.] A government by many chiefs, princes, or rules. [Obs.] Cudworth.

Pol"y*chord (?), a. [Gr. &?;; poly`s many + &?; string, cord.] Having many strings.

Pol"y*chord, n. (Mus.) (a) A musical instrument of ten strings. (b) An apparatus for coupling two octave notes, capable of being attached to a keyed instrument.

Pol"y*chrest (?), n. [Gr. &?; useful for many purposes; poly`s many + &?; useful, fr. &?; to use: cf. F. polychreste.] (Med.) A medicine that serves for many uses, or that cures many diseases. [Obs.]

Polychrest salt (Old Med. Chem.), potassium sulphate, specifically obtained by fusing niter with sulphur.

Pol"y*chro*ism (?), n. [Poly- + Gr. &?; color.] Same as Pleochroism.

Pol"y*chro*ite (?), n. [Poly- + Gr. &?; color: cf. F. polychroÔte.] (Chem.) The coloring matter of saffron; -- formerly so called because of the change of color on treatment with certain acids; -- called also crocin, and safranin.

Pol`y*chro"mate (?), n. [See Polychromic.] (Chem.) A salt of a polychromic acid.

Pol`y*chro"mate, n. [See Polychromatic.] (Chem.) A compound which exhibits, or from which may be prepared, a variety of colors, as certain solutions derived from vegetables, which display colors by fluorescence.

Pol`y*chro*mat"ic (?), a. [Poly- + chromatic.] Showing a variety, or a change, of colors.

Polychromatic acid (Old Chem.), a substance obtained by the action of nitric acid on aloes.

Pol"y*chrome (?), n. [Poly- + Gr. &?; color.] (Chem.) Esculin; -- so called in allusion to its fluorescent solutions. [R.]

Pol"y*chrome, a. [Cf. F. polychrome.] Executed in the manner of polychromy; as, polychrome printing.

Pol`y*chro"mic (?), a. [Poly- + (sense 1) Gr. &?;, or (sense 2) chromic.] 1. Polychromatic.

2. (Chem.) Pertaining to, or designating, any one of several acids (known only in their salts) which contain more than one atom of chromium.

Pol`y*chro"mous (?), a. Of or pertaining to polychromy; many-colored; polychromatic.

Pol"y*chro`my (?), n. [Poly- + Gr. &?; color.] (Anc. Art) The art or practice of combining different colors, especially brilliant ones, in an artistic way.

Pol`y*chro"ni*ous (?), a. [Poly- + Gr. &?; for a long time, &?; time.] Enduring through a long time; chronic.

Pol`y*clin"ic (?), n. [Poly- + clinic.] (Med.) A clinic in which diseases of many sorts are treated; especially, an institution in which clinical instruction is given in all kinds of disease.

Pol`y*con"ic (?), a. [Poly- + conic.] Pertaining to, or based upon, many cones.

Polyconic projection (Map Making), a projection of the earth's surface, or any portion thereof, by which each narrow zone is projected upon a conical surface that touches the sphere along this zone, the conical surface being then unrolled. This projection differs from conic projection in that latter assumes but one cone for the whole map. Polyconic projection is that in use in the United States coast and geodetic survey.

Pol`y*cot`y*le"don (?), n. [Poly- + cotyledon: cf. F. polycotylÈdone.] (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.