tegmen

noun, plural teg·mi·na [teg-muh-nuh] /ˈtɛg mə nə/.

1. a cover, covering, or integument.
2. Botany. the delicate inner integument or coat of a seed.
3. (of certain orthopterous insects) one of a pair of leathery forewings that forms a protective covering for the hind wings.

noun plural -mina (-mɪnə)

1. either of the leathery forewings of the cockroach and related insects
2. the delicate inner covering of a seed
3. any similar covering or layer

n. pl. teg•mi•na (-mə-nə)

1. A covering or an integument of a part.tegmentum

1. A covering or integument, such as the tough leathery forewing of certain insects or the inner coat of a seed.