Definitions

1. verb

to divide into or become separated by a fold or a fissure, especially a longitudinal one; to form a fold or fissure

“The leaf began to vaginate as it grew older.”

2. verb

to have or produce a fissure or fold, especially a longitudinal one

“The stem of the plant will vaginate as it matures.”

3. noun

a fissure or fold, especially a longitudinal one; a part of an organ that has become separated by a fissure or fold

“The vaginations in the plant’s stem allowed it to grow more efficiently.”