Hypertext Webster Gateway: "uncini"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Uncinus \Un*ci"nus\, n.; pl. {Uncini}. [L., a hook.] (Zo["o]l.)
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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