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. |