Of or relating to the straight middle section of a C-shaped sponge spicule. Cf. tropis, n. 1.
| 单词 | θ31872 |
| 释义 | the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [adjective] > relating to a sponge > of parts of sponge > of keel of C-shaped sponge spicule (1) tropidial1887 Of or relating to the straight middle section of a C-shaped sponge spicule. Cf. tropis, n. 1. |
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