n.
Function: noun
Etymology: Latin testa shell
Date: circa 1842
: an external hard or firm covering (as a shell) of many invertebrates (as a foraminifer or a mollusk)
n.
Function: noun
Etymology: Latin testa shell
Date: circa 1842
: an external hard or firm covering (as a shell) of many invertebrates (as a foraminifer or a mollusk)
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012