INTEGUMENT
integument
(noun) an outer protective covering such as the skin of an animal or a cuticle or seed coat or rind or shell
Source: WordNet® 3.1
Etymology
Noun
integument (plural integuments)
(biology) An outer protective covering such as the feathers or skin of an animal, a rind or shell.
(botany) The outer layer of an ovule, which develops into the seed coat.
Source: Wiktionary
In*teg"u*ment, n. Etym: [L. integumentum, fr. integere to cover;
pref. in- in, on + tegere to cover: cf. F. intégument. See 1st n-,
and Tegument.]
Definition: That which naturally invests or covers another thing, as the
testa or the tegmen of a seed; specifically (Anat.), a covering which
invests the body, as the skin, or a membrane that invests a
particular.
Source: Webster’s Unabridged Dictionary 1913 Edition