Hypertext Webster Gateway: "epidermis"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Periostracum \Per`i*os"tra*cum\, n.; pl. {Periostraca}. [NL.,
fr. Gr. ? around + ? shell of a testacean.] (Zo["o]l.)
A chitinous membrane covering the exterior of many shells; --
called also {epidermis}.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Epidermis \Ep`i*der"mis\, n. [L., fr. Gr. ?; ? over + ? skin,
fr. ? to skin. See {Tear}, v. t.]
1. (Anat.) The outer, nonsensitive layer of the skin;
cuticle; scarfskin. See {Dermis}.
2. (Bot.) The outermost layer of the cells, which covers both
surfaces of leaves, and also the surface of stems, when
they are first formed. As stems grow old this layer is
lost, and never replaced.
From WordNet (r) 1.7 (wn)
epidermis
n : the outer layer of the skin covering the exterior body
surface of vertebrates [syn: {cuticle}]
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