| Testaceous 1. (a.) Of or pertaining to shells; consisted Of a hard shell, or having a hard shell. 2. (a.) Having a dull red brick color or a brownish yellow color. Thesaurus Entries cortical, dermal, dermic, ecderonic, ectodermal, ectodermic, endermatic, endermic, epicarpal, epidermal, epidermic, furry, hypodermal, hypodermic, intracardiac, intradermal, intramedullary, intraspinal, intrathecal, intravenous, percutaneous, skin-deep, skinny, subcutaneous, testaceous | ![]() |