Uncinus n. : One of the peculiar minute chitinous hooks found in large numbers in the tori of tubicolous annelids belonging to the Uncinata.

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Taxonomy
Cirrus uncinus, Cirrus uncinus cloud, free encyclopedia, High-level, Cirrus, Altitude, clouds, search, Unsourced, Abbreviation, unc, curl, hair, uncinus, Family, Appearance, hooks, mares.

Defination from the web:
uncinus cloud. From Wikipedia, the free encyclopedia. Jump to: navigation, search. This article does not cite any references or sources. ... Cirrus uncinus is a type of cirrus cloud. The name cirrus uncinus is derived from Latin, meaning "curly hooks" ...