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thecosome
thecosome n.
Brit. 
/ˈθiːkə(ʊ)səʊm/
, /ˈθiːkə(ʊ)səʊm/U.S. /ˈθikəˌsoʊm/
a thecosomatous pteropod. [Compare French thécosome (1824 or earlier).] /ˈθikəˌsoʊm/ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [noun] > class Pteropoda > member of > other part of
thecosome1890
1890 Athenæum 12 July 66/2 The thecosomes being tornatellids modified for a swimming life.
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