The Collaborative International Dictionary
Bullate leaf
Bullate \Bul"late\ (b[u^]l"l[asl]t/), a. [L. bullatus, fr. bulla bubble.] (Biol.) Appearing as if blistered; inflated; puckered.
Bullate leaf (Bot.), a leaf, the membranous part of which rises between the veins puckered elevations convex on one side and concave on the other.