pulvinus
/pʌlˈvaɪnəs/noun
(pl. pulvini /-naɪ/)
- Botany an enlarged section at the base of a leaf stalk in some plants, which is subject to changes of turgor leading to movements of the leaf or leaflet【植】叶座, 叶枕。
词源
mid 19th cent.: from Latin, literally 'cushion'.