testaceousTESTA'CEOUS, a. [L. testaceus, from testa, a shell. The primary sense of testa, testis, testor, &c. is to thrust or drive; hence the sense of hardness, compactness, in testa and testis; and hence the sense of attest, context, detest, testator, testament, all implying a sending, driving, &c.] Pertaining to shells; consisting of a hard shell, or having a hard continuous shell. |