D defs.my
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Entry 1 sense Webster, 1913

Thecosomata

· The·co·so·ma·ta · IPA
01 n. pl. An order of Pteropoda comprising those species which have a shell. See Pteropoda.
  1. 1.
    An order of Pteropoda comprising those species which have a shell. See Pteropoda.(Zool.) See: Pteropoda