A natural outer covering or coat, such as the skin of an animal or the membrane enclosing an organ.
Botany The envelope of an ovule.
[Latin integumentum, from integere, to cover : in-, on; see in-2 + tegere, to cover; see (s)teg- in Indo-European roots.] in·teg'u·men'ta·ry (-měn'tə-rē, -měn'trē) adj.