| COISTRILS | • coistrils n. Plural of coistril. • COISTRIL n. (obsolete) an inferior groom or lad employed by an esquire to carry the knight's arms and other necessaries, also COISTREL, COYSTREL, COYSTRIL, CUSTREL. |
| COYSTRILS | • coystrils n. Plural of coystril. • COYSTRIL n. (obsolete) an inferior groom or lad employed by an esquire to carry the knight's arms and other necessaries, also COISTREL, COISTRIL, COYSTREL, CUSTREL. |
| ESTRILDID | • estrildid n. (Zoology) Any weaverbird of the family Estrildidae. • ESTRILDID n. any member of a genus of oscinine birds, the weaver-finches. |
| LAETRILES | • laetriles n. Plural of laetrile. • LAETRILE n. (tradename) a drug derived from apricot pits, used in the treatment of cancer. |
| MATRILINY | • matriliny n. Matrilineal society. • MATRILINY n. descent reckoned through the mother. |
| PATRILINY | • patriliny n. Patrilineal society. • PATRILINY n. descent reckoned through the father. |
| TESTRILLS | • TESTRILL n. (obsolete) a sixpence, also TESTRIL. |
| TRILEMMAS | • trilemmas n. Plural of trilemma. • TRILEMMA n. a dilemma-like position offering three choices. |
| TRILINEAR | • trilinear adj. Having, or bounded by, three lines. • trilinear n. (Mathematics) A triple (x, y, z) of the algebraic distances of a point to each side of a surrounding triangle. • TRILINEAR adj. of, pertaining to, or included by, three lines; as, trilinear coordinates. |
| TRILITHIC | • trilithic adj. Pertaining to a trilith. • TRILITHIC adj. pertaining to a trilith. |
| TRILITHON | • trilithon n. A structure consisting of two stone pillars supporting a horizontal stone. • TRILITHON n. (Greek) a stone monument of two upright and one transverse slab, also TRILITH. |
| TRILLINGS | • trillings n. Plural of trilling. • TRILLING n. one child of triplets. |
| TRILLIONS | • trillions n. Plural of trillion. • TRILLION n. a number, a million million. |
| TRILLIUMS | • trilliums n. Plural of trillium. • TRILLIUM n. a three-leaved plant of the lily family. |
| TRILOBATE | • trilobate adj. Having three lobes. • TRILOBATE adj. having three lobes, also TRILOBATED. |
| TRILOBITE | • trilobite n. An extinct arthropod of the class Trilobita, whose body had three large lobes. • TRILOBITE n. any one of numerous species of extinct arthropods belonging to the order Trilobita. |
| TRILOGIES | • trilogies n. Plural of trilogy. • TRILOGY n. a group of three related literary works. |
| UPTRILLED | • UPTRILLED adj. (Coleridge) trilled high. |