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单词 plumicome
释义

plumicomen.

Brit. /ˈpluːmᵻkəʊm/, U.S. /ˈpluməˌkoʊm/
Origin: A borrowing from Latin. Etymons: Latin plūmi-, coma.
Etymology: < classical Latin plūmi-, combining form (in e.g. plūmipēs plumiped adj.) of plūma plume n. + coma the hair of the head (see coma n.2).
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.

Derivatives

† plumicomous adj. Obsolete rare Apparently only attested in dictionaries or glossaries.
ΚΠ
1890 Cent. Dict. Plumicomous.
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
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n.1886
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