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单词 tropis
释义 tropis Zool.|ˈtrəʊpɪs|
Pl. tropides |ˈtrɒpɪdiːz|.
[mod.L., a. Gr. τρόπις keel.]
The ‘keel’ or middle part of a cymba or C-shaped sponge-spicule, between the proræ or ‘prows’.
1887Sollas in Encycl. Brit. XXII. 471/2 (Sponges) A truly C-shaped spicule... The back of the ‘C’ is the keel or tropis; the points are the prows or proræ.
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更新时间:2024/12/22 10:04:03