of, pertaining to, bearing, or shaped like a nail, claw, or hoof.

1825–35; < Latin ungu(is) a nail, claw, hoof (akin to Greek ónyx) + -al1

subungual, adjective
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World English Dictionary
ungual or ungular (ˈʌŋɡwəl, ˈʌŋɡjʊlə)
1.  of, relating to, or affecting the fingernails or toenails
2.  of or relating to an unguis
[C19: from Latin unguis nail, claw]
ungular or ungular
[C19: from Latin unguis nail, claw]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

"pertaining to a nail or claw," 1834, from L. unguis "a claw, nail" (cognate with Gk. onyx, O.E. nægel, O.N. nagl "nail;" see nail).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

ungual un·gual (ŭng'gwəl)
Of or relating to fingernails or toenails.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
The distal portion of the ungual is tall and narrow and symmetrical in cross-section.
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