Invertebrate animals covered with shells, especially mollusks; shellfish.(noun-plural)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "testacea" in a sentence
"In the present state of science, it is chiefly by the aid of shells that we are enabled to arrive at these results, for of all classes the testacea are the most generally diffused in a fossil state, and may be called the medals principally employed by nature in recording the chronology of past events."
"The plants: Natives Chasmanthium latifolium Northern Sea Oats, a grass with dancing seedheads, and Aster laevis 'Bluebird,' a hit with butterflies, bees and birds, are paired with Carex testacea 'Prairie Fire' and Sedum sichotense, whose colors intensify as temperatures drop; bright chartreuse Lysimachia nummularia 'Aurea' adds to the show."
"Carex testacea ‘New Zealand Orange Sedge’ in the red pot has been a soldier of winter interest."