单词 | plumicome |
释义 | plumicomen. Zoology. rare. In siliceous sponges: a type of six-rayed spicule (hexaster) each of whose rays branches to form a feather-like tuft. ΚΠ 1886 R. von Lendenfeld in Proc. Zool. Soc. 562 Plumicome. Rays terminated with a number of plumose branches. 1911 Encycl. Brit. XXV. 723/1 A hexaster (= rosette) is a perfectly symmetrical hexact whose actines branch out into secondary or terminal rays. Various sub-types are distinguished according to the character of the rays (floricome, plumicome, &c.). 1957 Encycl. Brit. XXI. 257/1 (caption) Spicules of hexactinellid sponges... Plumicome. DerivativesΚΠ 1890 Cent. Dict. Plumicomous. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). < n.1886 |
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