testa

noun, plural tes·tae [tes-tee] /ˈtɛs ti/. Botany.

1. the outer, usually hard, integument or coat of a seed.

noun plural -tae (-tiː)

1. a hard protective outer layer of the seeds of flowering plants; seed coat

Plural testae (tĕs′tē′)

1. See seed coat.