testaceous

Etymology

From Latin testāceus.

adj

1. (obsolete) Pertaining to earthenware or baked clay.
2. Having a shell, especially one which is not articulated.
   Tyrian garbs, / Neptunian Albion's high teſtaceous food [i.e., oysters], / And flavour'd Chian wines with incenſe fum'd / To ſlake Patrician thirſt: for theſe, their rights / In the vile ſtreets they proſtitute to ſale; / Their ancient rights, their dignities, their laws, / Their native glorious freedom. 1740, John Dyer, “The Ruins of Rome. A Poem.”, in Poems. … Viz. I. Grongar Hill. II. The Ruins of Rome. III. The Fleece, in Four Books, London: Printed by John Hughs, for Messrs. R[obert] and J[ames] Dodsley,[…], published 1759, →OCLC, pages 42–43
   The Ship-VVorm of Jamaica. This inſect is extremely deſtructive to all the ſhips that anchor for any time in the harbours of Jamaica, or in any other part vvithin the tropics: They cut vvith great facility through the planks, and burrovv a conſiderable vvay in the ſubſtance of them, incruſtating the ſides of all their holes vvith a ſmooth teſtaceous ſubſtance[…]. 1756, Patrick Browne, “Of Insects”, in The Civil and Natural History of Jamaica.[…], London: […] T[homas] Osborne, and J. Shipton,[…], →OCLC, part II, book III, class I, section II, order IV, page 395
3. Of a dull orange or brownish colour, like brick.