Testacea

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Any of various shellfish, especially those of the obsolete orders Vermes or Acephala, or the suborder Thecosomata. obsolete, plural, plural-only

    "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."

  2. 2
    A testaceous substance, something made of shell or shell-like material. obsolete, rare, uncountable

Synonyms

All synonyms
order testacea

Example

More examples

"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."

Etymology

From Latin testāceus (“covered with a shell”).

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.