eponychium

noun, plural ep·o·nych·i·a

[-nik-ee-uh] .

Embryology. the modified outer layer of the epidermis that partially covers the fetal fingernails and toenails and that persists after birth as the cuticle.

Anatomy. a thin, cuticular fold extending over the lunula of a nail.

Also, epionychium.

Origin:
1880–85; < Neo-Latin, equivalent to ep- ep- + onych- (see onyx) + -ium -ium

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Medical Dictionary

eponychium ep·o·nych·i·um (ěp'ə-nĭk'ē-əm)
n.

The condensed eleidin-rich areas of the epidermis preceding the formation of nails in the embryo.
The thin skin adhering to the nail at its base.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Eponychium is always a great word to know.

So is flibbertigibbet. Does it mean:

a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.

a chattering or flighty, light-headed person.

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