1Rounded, bulging (rare ); ( Architecture, of a frieze) having a convex face.
2Botany. Of a leaf or leaflet: = pulvinate.
Origin
Late 17th century; earliest use found in Martin Lister (bap. 1639, d. 1712), physician and naturalist. From classical Latin pulvīnātus cushion-shaped + -ed. With the specifically use in architecture in sense 1 compare Italian pulvino.