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Pronunciation varies by accent · noun
(biology, obsolete) Any of various shellfish, especially those of the obsolete orders Vermes or Acephala, or the suborder Thecosomata..
ANAIMONA, Aquatilia Exanguia, Bloodless Fishes, are divided into Mollia Soft Fishes without Shells; Crustata, those that are covered with thin pliant Shells; and Testacea, those which have thick, hard brittle Shells.
The echinite family […] may be deemed characteristic of the chalk formation, affording of itself as many shells as the other testacea do.
[…]to fancy, for example, that the testacea of the ocean existed first, until some of them, by gradual evolution, were improved into those inhabiting the land.
Use testacea when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Testacea means (biology, obsolete) Any of various shellfish, especially those of the obsolete orders Vermes or Acephala, or the suborder Thecosomata..
Common synonyms include order testacea.
The opposite depends on the specific sense.
ANAIMONA, Aquatilia Exanguia, Bloodless Fishes, are divided into Mollia Soft Fishes without Shells; Crustata, those that are covered with thin pliant Shells; and Testacea, those which have thick, hard brittle Shells.
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