See Also: pulvinus(medicine)
pulvinus(dictionary)

pulvinus (iou)



pulvinus noun. . M19.
[Latin = cushion, pillow.]
Botany. Any cushion-like swelling; esp. a special enlargement at the base of a petiole or petiolule in some plants, which is subject to changes of turgor leading to nastic movements of the leaf or leaflet.