The Collaborative International Dictionary
Vaginant
Vaginant \Vag"i*nant\, a. [Cf. F. vaginant. See Vagina.] Serving to in invest, or sheathe; sheathing.
Vaginant leaf (Bot.), a leaf investing the stem or branch by its base, which has the form of a tube.
Wiktionary
vaginant
a. (context botany English) Serving as a sheathe.