[pul.vi.nus] n, pl -vi.ni [NL, fr. L, cushion] (1857): a mass of large thin-walled cells surrounding a vascular strand at the base of a petiole or petiolule and functioning in turgor movements of leaves or leaflets
PULVINUS
Meaning of PULVINUS in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012