† tropidialadj.

Origin: A borrowing from Greek, combined with an English element. Etymons: Greek τροπιδ- , τρόπις , -ial suffix.

Etymology: < ancient Greek τροπιδ-, τρόπις keel (see tropis n.) + -ial suffix. N.E.D. (1915) gives the pronunciation as (tropi·diăl) /trəʊˈpɪdɪəl/.

Zoology. Obsolete. rare.

Of or relating to the straight middle section of a C-shaped sponge spicule. Cf. tropis n. 1.

ΘΚΠ

the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [adjective] > relating to a sponge > of parts of sponge > of keel of C-shaped sponge spicule

tropidial1887

1887 W. J. Sollas in Encycl. Brit. XXII. 418/1 The pterocymba is subject to considerable modifications;..additional lamellæ (tropidial pteres) may be produced by a lateral outgrowth of the keel.

This entry has been updated (OED Third Edition, March 2014; most recently modified version published online September 2021).

单词	tropidial
释义	† tropidialadj. Origin: A borrowing from Greek, combined with an English element. Etymons: Greek τροπιδ- , τρόπις , -ial suffix. Etymology: < ancient Greek τροπιδ-, τρόπις keel (see tropis n.) + -ial suffix. N.E.D. (1915) gives the pronunciation as (tropi·diăl) /trəʊˈpɪdɪəl/. Zoology. Obsolete. rare. Of or relating to the straight middle section of a C-shaped sponge spicule. Cf. tropis n. 1. ΘΚΠ the world > animals > invertebrates > subkingdom Parazoa > phylum Porifera > [adjective] > relating to a sponge > of parts of sponge > of keel of C-shaped sponge spicule tropidial1887 1887 W. J. Sollas in Encycl. Brit. XXII. 418/1 The pterocymba is subject to considerable modifications;..additional lamellæ (tropidial pteres) may be produced by a lateral outgrowth of the keel. This entry has been updated (OED Third Edition, March 2014; most recently modified version published online September 2021). < adj.1887
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