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.
