| quadritubercular | Having four tubercles or cusps, as a molar tooth. Origin: quadri-+ L. Tuberculum, tubercle (05 Mar 2000) |
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| quadrivalence | <chemistry> The quality or state of being quadrivalent; tetravalence. Source: Websters Dictionary (01 Mar 1998) |
| quadrivalent | Describes an association of four homologous chromosomes at meiosis. (09 Oct 1997) |
| quadrivalve | <botany> Dehiscent into four similar parts; four-valved; as, a quadrivalve pericarp. Origin: Quadri- + valve: cf. F. Quadrivalve. Source: Websters Dictionary (01 Mar 1998) |
| quadrivium | The four "liberal arts," arithmetic, music, geometry, and astronomy; so called by the schoolmen. See Trivium. Origin: L. Source: Websters Dictionary (01 Mar 1998) |