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单词 thecostome
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thecostome
thecostome n.
Brit. /ˈθiːkə(ʊ)stəʊm/
,
U.S. /ˈθikəˌstoʊm/
the orifice of the hydrotheca in calyptoblastic hydroids. [Compare French thécostome (1825 or earlier).]
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Diploblastica > phylum Coelenterata > [noun] > class Hydrozoa > order Campanulariae > genus Campanularia > member of > orifice of hydrotheca
thecostome1883
1883 Rep. Sci. Results Voy. H.M.S. Challenger: Zool. VII. xx. 7 On either side of the hydrotheca, nearly on a level with its orifice or thecostome.
extracted from theco-comb. form
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