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单词 pinnulus
释义

pinnulusn.

Origin: Apparently a variant or alteration of another lexical item. Etymon: pinnule n.
Etymology: Apparently an alteration of pinnule n., after -ulus suffix.
Zoology. Obsolete. rare.
A type of sponge spicule in which one ray has a series of short spines along its length, arranged pinnately.
ΚΠ
1887 W. J. Sollas in Encycl. Brit. XXII. 417/1 The suppression of the proximal ray and the development of spines projecting forwards on the distal ray produce the pinnulus.
This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2020).
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n.1887
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