Part 708

Quad`ri*en"ni*al (?), a. Same as Quadrennial.

Quad`ri*fa"ri*ous (?), a. [L. quadrifarius fourfold, fr. quattuor four: cf. F. quadrifariÈ. Cf. Multifarious.] Arranged in four rows or ranks; as, quadrifarious leaves. Loudon.

Quad"ri*fid (?), a. [L. quadrifidus; quattuor four + findere to cleave: cf. F. quadrifide.] Divided, or deeply cleft, into four parts; as, a quadrifid perianth; a quadrifid leaf.

{ Quad"ri*foil (?), Quad`ri*fo"li*ate (?), } a. [Quadri- + L. folium leaf.] (Bot.) Four-leaved; having the leaves in whorls of four.

Quad`ri*fur"ca*ted (?), a. [Quadri- + furcated.] Having four forks, or branches.

||Quad*ri"ga (?), n.; pl. QuadrigÊ (#). [L. See Quadrijugous.] (Rom. ||Antiq.) A car or chariot drawn by four horses abreast.

{ Quad`ri*gem"i*nal (?), Quad`ri*gem"i*nous (?), } a. [Quadri- + L. gemini twins.] Fourfold; having four similar parts, or two pairs of similar parts.

Quadrigeminal bodies (Anat.), two pairs of lobes, or elevations, on the dorsal side of the midbrain of most mammals; the optic lobes. The anterior pair are called the nates, and the posterior the testes.

Quad`ri*ge*na"ri*ous (?), a. [L. quadrigeni, quadringeni, four hundred each.] Consisting of four hundred.

Quad*rij"u*gate (?), a. Same as Quadrijugous.

Quad*rij"u*gous (?), a. [L. quadrijugus of a team of four; quattuor four + jugum yoke.] (Bot.) Pinnate, with four pairs of leaflets; as, a quadrijugous leaf.

Quad`ri*lat"er*al (?), a. [L. quadrilaterus: cf. F. quadrilatËre, quadrilatÈral. See Quadri- and Lateral.] Having four sides, and consequently four angles; quadrangular.

Quad`ri*lat"er*al, n. 1. (Geom.) A plane figure having four sides, and consequently four angles; a quadrangular figure; any figure formed by four lines.

2. An area defended by four fortresses supporting each other; as, the Venetian quadrilateral, comprising Mantua, Peschiera, Verona, and Legnano.

Complete quadrilateral (Geom.), the figure made up of the six straight lines that can be drawn through four points, A, B, C, I, the lines being supposed to be produced indefinitely.

Quad`ri*lat"er*al*ness, n. The property of being quadrilateral.

Quad`ri*lit"er*al (?), a. [Quadri- + literal.] Consisting of four letters.

Qua*drille" (?), n. [F. quadrille, n. fem., fr. Sp. cuadrilla meeting of four or more persons or It. quadriglia a band of soldiers, a sort of dance; dim. fr. L. quadra a square, fr. quattuor four. See Quadrate.] 1. A dance having five figures, in common time, four couples of dancers being in each set.

2. The appropriate music for a quadrille.

Qua*drille", n. [F. quadrille, n. masc., cf. It. quadriglio; or perhaps from the Spanish. See Quadrille a dance.] A game played by four persons with forty cards, being the remainder of an ordinary pack after the tens, nines, and eights are discarded. Hoyle.

Quad*ril"lion (?), n. [F., fr. L. quater four times, akin to quattuor four, E. four; -- formed like million. See Four, Million.] According to the French notation, which is followed also upon the Continent and in the United States, a unit with fifteen ciphers annexed; according to the English notation, the number produced by involving a million to the fourth power, or the number represented by a unit with twenty-four ciphers annexed. See the Note under Numeration.

{ Quad`ri*lo"bate (?), Quad`ri*lobed (?), } a. [Quadri- + lobe: cf. F. quadrilobÈ.] Having four lobes; as, a quadrilobate leaf.

Quad`ri*loc"u*lar (?), a. [Quadri- + locular: cf. F. quadriloculaire.] Having four cells, or cavities; as, a quadrilocular heart.

Quad"rin (?), n. [OF., fr. L. quadrini four each, fr. quattuor four.] A small piece of money, in value about a farthing, or a half cent. [Obs.]

Quad`ri*nod"al (?), a. [Quadri- + nodal.] (Math.) Possessing four nodes; as, quadrinodal curves.

Quad`ri*no"mi*al (?), n. [Quadri- + nomial, as in binomial: cf. F. quadrinÙme.] (Alg.) A polynomial of four terms connected by the signs plus or minus.

Quad`ri*nom"ic*al (?), a. Quadrinomial.

Quad`ri*nom"i*nal (?), a. [Quadri- + nominal.] (Alg.) Quadrinomial. Sir W. R. Hamilton.