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.