Quadricapsular adjective [ Quadri- + capsular .] (Botany) Having four capsules.

Quadriceps noun [ New Latin , from Latin qyattuor four + caput head.] (Anat.) The great extensor muscle of the knee, divided above into four parts which unite in a single tendon at the knee.

Quadricipital noun (Anat.) Of or pertaining to the quadriceps.

Quadricorn noun [ See Quadricornous .] (Zoology) Any quadricornous animal.

Quadricornous adjective [ Quadri- + Latin cornu horn: confer French quadricorne .] (Zoology) Having four horns, or hornlike organs; as, a quadricornous beetle.

Quadricostate adjective [ Quadri- + costate .] Having four ribs.

Quadridentate adjective [ Quadri- + dentate .] Having four teeth; as, a quadridentate leaf.

Quadriennial adjective Same as Quadrennial .

Quadrifarious adjective [ Latin quadrifarius fourfold, from quattuor four: confer French quadrifarié . Confer Multifarious .] Arranged in four rows or ranks; as, quadrifarious leaves. Loudon.

Quadrifid adjective [ Latin quadrifidus ; quattuor four + findere to cleave: confer French quadrifide .] Divided, or deeply cleft, into four parts; as, a quadrifid perianth; a quadrifid leaf.

Quadrifoil, Quadrifoliate adjective [ Quadri- + Latin folium leaf.] (Botany) Four-leaved; having the leaves in whorls of four.

Quadrifurcated adjective [ Quadri- + furcated .] Having four forks, or branches.

Quadriga noun ; plural Quadrigæ . [ Latin See Quadrijugous .] (Rom. Antiq.) A car or chariot drawn by four horses abreast.

Quadrigeminal, Quadrigeminous adjective [ Quadri- + Latin 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 .

Quadrigenarious adjective [ Latin quadrigeni , quadringeni , four hundred each.] Consisting of four hundred.

Quadrijugate adjective Same as Quadrijugous .

Quadrijugous adjective [ Latin quadrijugus of a team of four; quattuor four + jugum yoke.] (Botany) Pinnate, with four pairs of leaflets; as, a quadrijugous leaf.

Quadrilateral adjective [ Latin quadrilaterus : confer French quadrilatère , quadrilatéral . See Quadri- and Lateral .] Having four sides, and consequently four angles; quadrangular.

Quadrilateral noun
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.

Quadrilateralness noun The property of being quadrilateral.

Quadriliteral adjective [ Quadri- + literal .] Consisting of four letters.

Quadrille noun [ French quadrille , noun fem., from Spanish cuadrilla meeting of four or more persons or Italian quadriglia a band of soldiers, a sort of dance; dim. from Latin quadra a square, from 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.

Quadrillé adjective [ French] (Art) Marked with squares, generally by thin lines crossing at right angles and at equal intervals; as, quadrillé paper, or plotting paper.

Quadrillion noun [ French, from Latin quater four times, akin to quattuor four, English 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 .

Quadrilobate, Quadrilobed adjective [ Quadri- + lobe : confer French quadrilobé .] Having four lobes; as, a quadrilobate leaf.

Quadrilocular adjective [ Quadri- + locular : confer French quadriloculaire .] Having four cells, or cavities; as, a quadrilocular heart.

Quadrin noun [ Old French , from Latin quadrini four each, from quattuor four.] A small piece of money, in value about a farthing, or a half cent. [ Obsolete]

Quadrinodal adjective [ Quadri- + nodal .] (Math.) Possessing four nodes; as, quadrinodal curves.

Quadrinomial noun [ Quadri- + nomial , as in binomial : confer French quadrinôme .] (Alg.) A polynomial of four terms connected by the signs plus or minus.

Quadrinomical adjective Quadrinomial.

Quadrinominal adjective [ Quadri- + nominal .] (Alg.) Quadrinomial. Sir W. R. Hamilton.

Quadripartite adjective [ Latin quadripartitus , past participle of quadripartire to divide into four parts; quattuor four + partire to divide: confer French quadripartite .] Divided into four parts.

Quadripartitely adverb In four parts.

Quadripartition noun [ Latin quadripartitio : confer French quadripartition .] A division or distribution by four, or into four parts; also, a taking the fourth part of any quantity or number.

Quadripennate adjective [ Quadri- + pennate .] (Zoology) Having four wings; -- said of insects.

Quadriphyllous adjective [ Quadri + Greek ... leaf.] (Botany) Having four leaves; quadrifoliate.

Quadrireme noun [ Latin quadriremis ; quattuor four + remus an oar: confer French quadrirème .] (Antiq.) A galley with four banks of oars or rowers.

Quadrisection noun [ Quadri- + section .] A subdivision into four parts.

Quadrisulcate adjective [ Quadri + sulcate .] (Zoology) Having four hoofs; as, a quadrisulcate foot; a quadrisulcate animal.

Quadrisyllabic, Quadri-syllabical } Having four syllables; of or pertaining to quadrisyllables; as, a quadrisyllabic word.

Quadrisyllable noun [ Quadri- + syllable : confer French quadrisyllabe .] A word consisting of four syllables. De Quincey.

Quadrivalence noun (Chemistry) The quality or state of being quadrivalent; tetravalence.

Quadrivalent adjective [ Quadri- + Latin valens , -entis , present participle See Valence .] (Chemistry) Having a valence of four; capable of combining with, being replaced by, or compared with, four monad atoms; tetravalent; -- said of certain atoms and radicals; thus, carbon and silicon are quadrivalent elements.

Quadrivalve adjective [ Quadri- + valve : confer French quadrivalve .] (Botany) Dehiscent into four similar parts; four-valved; as, a quadrivalve pericarp.

Quadrivalve noun (Architecture) A door, shutter, or the like, having four folds.

Quadrivalvular adjective Having four valves; quadrivalve.

Quadrivial adjective [ Latin quadrivium a place where four ways meet; quattuor four + via way.] Having four ways meeting in a point. B. Jonson.

Quadrivial noun One of the four "liberal arts" making up the quadrivium.

Quadrivium noun [ Latin ] The four "liberal arts," arithmetic, music, geometry, and astronomy; -- so called by the schoolmen. See Trivium .