| Words | Parts of Speech | Meaning/Definition/Similar Words |
|---|---|---|
| quadragesimal | adjective | Belonging to Lent; used in Lent; Lenten. |
| quadratojugal | adjective | Of or pertaining to the quadrate and jugal bones., Of or pertaining to the quadratojugal bone., The quadratojugal bone. |
| quadrennially | adverb | Once in four years. |
| quadricipital | noun | Of or pertaining to the quadriceps. |
| quadricornous | adjective | Having four horns, or hornlike organs; as, a quadricornous beetle. |
| quadricostate | adjective | Having four ribs. |
| quadridentate | adjective | Having four teeth; as, a quadridentate leaf. |
| quadrifarious | adjective | Arranged in four rows or ranks; as, quadrifarious leaves. |
| quadrifoliate | adjective | Four-leaved; having the leaves in whorls of four. |
| quadrigeminal | adjective | Alt. of Quadrigeminous |
| quadrilateral | adjective | Having four sides, and consequently four angles; quadrangular., A plane figure having four sides, and consequently four angles; a quadrangular figure; any figure formed by four lines., An area defended by four fortresses supporting each other; as, the Venetian quadrilateral, comprising Mantua, Peschiera, Verona, and Legnano. |
| quadriliteral | adjective | Consisting of four letters. |
| quadrilocular | adjective | Having four cells, or cavities; as, a quadrilocular heart. |
| quadrinomical | adjective | Quadrinomial. |
| quadrinominal | adjective | Quadrinomial. |
| quadripartite | adjective | Divided into four parts. |
| quadripennate | adjective | Having four wings; — said of insects. |
| quadrisection | noun | A subdivision into four parts. |
| quadrisulcate | adjective | Having four hoofs; as, a quadrisulcate foot; a quadrisulcate animal. |
| quadrivalence | noun | The quality or state of being quadrivalent; tetravalence. |
| quadruplicate | verb t. | To make fourfold; to double twice; to quadruple., Fourfold; doubled twice; four times repeated; as, a quadruplicate ratio, or a quadruplicate proportion., Raised to the fourth power. |