testaceous

[ te-stey-shuh s ]

/ tɛˈsteɪ ʃəs /

of, relating to, or derived from shells.

having a test or shell-like covering.

of a brick-red, brownish-red, or brownish-yellow color.

Origin of testaceous

1640–50; < Latin testāceus shell-covered, equivalent to test(a) (see test²) + -āceus -aceous

Down, Ireland in which he found upwards of fifty small crabs, and other testaceous and crustaceous animals.

Natural History in Anecdote |Various
Fore wings with an upright, straight, testaceous exterior band, which does not extend to the interior border.

Journal of the Proceedings of the Linnean Society - Vol. 3 |Various
The Limax, or common garden slug, which has a testaceous shield beneath its mantle, is an instance of this.

A Conchological Manual |George Brettingham Sowerby
The testaceous appendage of the Coriocella is now well known to naturalists.

A Conchological Manual |George Brettingham Sowerby

Birds of many kinds are abundant, as are fishes and testaceous animals.

Audubon and his Journals, Vol. 2 |Maria R. Audubon

testaceous

/ (tɛˈsteɪʃəs) /

of, relating to, or possessing a test or testa

of the reddish-brown colour of terra cotta

C17: from Latin testācens, from testa