| 释义 |
pul·vi·nus
\ˌpəlˈvīnəs\ noun
(plural pulvi·ni \-īˌnī\)
Etymology: New Latin, from Latin, cushion
: a cushionlike enlargement of the base of a petiole or petiolule consisting of a mass of large thin-walled cells surrounding a vascular strand and functioning in turgor movements of leaves or leaflets by reversible volume changes in the cells |