Tes*ta"ceous (?), a. [L. testaceus, fr. testa a shell. See Testa.]


Of or pertaining to shells; consisted of a hard shell, or having a hard shell.

2. Bot. & Zool.

Having a dull red brick color or a brownish yellow color.

Testaceous animals Zool., 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.


© Webster 1913.

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