The Collaborative International Dictionary
Interfoliaceous
Interfoliaceous \In`ter*fo`li*a"ceous\, a. [Pref. inter- + foliaceous: cf. F. interfoliac['e].] (Bot.) At the same node with opposite or whorled leaves, but occupying a position between their places of attachment.
Wiktionary
interfoliaceous
a. (context botany English) At the same node with opposite or whorled leaf, but occupying a position between their places of attachment.