Part 741

Quincuncial phyllotaxy (Bot.), an arrangement of five leaves in a spiral, each leaf two fifths of a circle from the next.

Quin*cun"cial*ly, adv. In the manner or order of a quincunx.

Quin"cunx (?), n. [L., fr. quinque five + uncia an ounce. The quincunx was marked by five small spots or balls. See Five, and Ounce the weight.] 1. An arrangement of things by fives in a square or a rectangle, one being placed at each corner and one in the middle; especially, such an arrangement of trees repeated indefinitely, so as to form a regular group with rows running in various directions.

2. (Astrol.) The position of planets when distant from each other five signs, or 150∞. Hutton.

3. (Bot.) A quincuncial arrangement, as of the parts of a flower in Êstivation. See Quincuncial, 2.

Quin*dec"a*gon (?), n. [L. quindecim fifteen + Gr. &?; angle.] (Geom.) A plane figure with fifteen angles, and consequently fifteen sides.

||Quin`de*cem"vir (?), n.; pl. E. Quindecemvirs (#), L. Quindecemviri ||(#). [L., from quindecim fifteen + vir a man.] (Rom. Antiq.) One of a ||sacerdotal college of fifteen men whose chief duty was to take care ||of the Sibylline books.

Quin`de*cem"vi*rate (?), n. [L. quindecimviratus.] The body or office of the quindecemviri.

Quin*dec"one (?), n. [L. quindecim fifteen.] (Chem.) An unsaturated hydrocarbon, C15H26, of the valylene series, produced artificially as an oily liquid. [Written also quindekone.]

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Quin`de*cyl"ic (?), n. [L. quindecim fifteen + -yl.] (Chem.) Pertaining to, or designating, an acid of the fatty acid series, containing fifteen atoms of carbon; called also pentadecylic acid.

Quin"dem (?), n. A fifteenth part. [Obs.]

Quin"dism (?), n. A fifteenth. [Obs.] Prynne.

Quin*hy"drone (?), n. [Quinone + hydroquinone.] (Chem.) A green crystalline substance formed by the union of quinone with hydroquinone, or as an intermediate product in the oxidation of hydroquinone or the reduction of quinone. [Written also chinhydrone.]

||Quin"i*a (?), n. [NL.] (Chem.) Quinine.

Quin"i*ble (?), n. [L. quini five each.] (Mus.) An interval of a fifth; also, a part sung with such intervals. [Obs.] "He sang . . . a loud quynyble." Chaucer.

Quin"ic (?), a. [See Quinine, and cf. Kinic.] (Chem.) Pertaining to, derived from, or connected with, quinine and related compounds; specifically, designating a nonnitrogenous acid obtained from cinchona bark, coffee, beans, etc., as a white crystalline substance. [Written also chinic, kinic.]

Quin"i*cine (?), n. (Chem.) An uncrystallizable alkaloid obtained by the action of heat from quinine, with which it is isomeric.

Quin"i*dine (?), n. (Chem.) An alkaloid isomeric with, and resembling, quinine, found in certain species of cinchona, from which it is extracted as a bitter white crystalline substance; conchinine. It is used somewhat as a febrifuge. [Written also chinidine.]

Qui"nine (?), n. [F. (cf. Sp. quinina), fr. Sp. quina, or quinaquina, Peruvian bark, fr. Peruv. kina, quina, bark. Cf. Kinic.] (Chem.) An alkaloid extracted from the bark of several species of cinchona (esp. Cinchona Calisaya) as a bitter white crystalline substance, C20H24N2O2. Hence, by extension (Med.), any of the salts of this alkaloid, as the acetate, chloride, sulphate, etc., employed as a febrifuge or antiperiodic. Called also quinia, quinina, etc. [Written also chinine.]

Qui*nin"ic (?), a. (Chem.) Pertaining to, or designating, a nitrogenous acid obtained as a yellow crystalline substance by the oxidation of quinine.

{ Qui"nin*ism (?), Qui"nism (?), } n. (Med.) See Cinchonism.

Qui*niz"a*rin (?), [Hydroquinone + alizarin.] (Chem.) A yellow crystalline substance produced artificially. It is isomeric with alizarin.

Quin"i*zine (?), n. [Quinoline + hydrazine.] (Chem.) any one of a series of nitrogenous bases, certain of which are used as antipyretics.

Quin"nat (?), n. [From the native name.] (Zoˆl.) The California salmon (Oncorhynchus choicha); -- called also chouicha, king salmon, chinnook salmon, and Sacramento salmon. It is of great commercial importance. [Written also quinnet.]

||Qui*no"a (?), n. The seeds of a kind of goosewort (Chenopodium ||Quinoa), used in Chili and Peru for making porridge or cakes; also, ||food thus made.

Quin"o*gen (?), n. [Quinine + -gen.] (Chem.) A hypothetical radical of quinine and related alkaloids.

Qui*noid"ine (?), n. [Quinine + -oid.] (Med. (Chem.) A brownish resinous substance obtained as a by-product in the treatment of cinchona bark. It consists of a mixture of several alkaloids. [Written also chinoidine.]