单词 | trochosphere |
释义 | > as lemmastrochosphere trochosphere n. Brit. /ˈtrɒkə(ʊ)sfɪə/ , U.S. /ˈtrɑkəˌsfɪ(ə)r/ a larval form constituting a stage in the development of most molluscs and of certain worms, esp. marine annelids, characterized by a spheroidal body with a ring of cilia; also attributive.ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > Trochozoa > [noun] > member of trochosphere1883 trochozoon1890 the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > Trochozoa > [adjective] > relating to or having form of a trochosphere trochosphere1883 trochospheric1899 the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [noun] > mollusc or shell-fish > larva veliger1877 trochosphere1883 1883 E. R. Lankester in Encycl. Brit. XVI. 648/1 [In the Limpet the] Diblastula..acquires a ciliated band, and becomes a nearly spherical Trochosphere. 1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 454 The Mollusca with the exception of Cephalopoda pass through a typical larval development, in two stages—a Trochosphere and a Veliger stage. < as lemmas |
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