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The Collaborative International Dictionary
Vaginated

Vaginate \Vag"i*nate\, Vaginated \Vag"i*na`ted\, a. [See Vagina.] Invested with, or as if with, a sheath; as, a vaginate stem, or one invested by the tubular base of a leaf.

Wiktionary
vaginated

a. (context botany English) Having a sheath.