a. 具介壳的, 介壳质的, 赤褐色的

[医] 有壳的, 有介壳的, 有甲壳的

[ adj ]
relating to or possessing a testa or hard shell
<adj.pert>
testaceous fish

Testaceous \Tes*ta"ceous\, a. [L. testaceus, fr. testa a shell.
See {Testa}.]
1. Of or pertaining to shells; consisted of a hard shell, or
having a hard shell.

2. (Bot. & Zo["o]l.) Having a dull red brick color or a
brownish yellow color.

{Testaceous animals} (Zo["o]l.), animals having a firm,
calcareous shell, as oysters and clams, thus distinguished
from {crustaceous animals}, whose shells are more thin and
soft, and consist of several joints, or articulations, as
lobsters and crabs.