pumpkin, n.
1 any of various plants of the genus Cucurbita, esp. C. maxima, with large lobed leaves and tendrils.
2 the large rounded yellow fruit of this with a thick rind and edible flesh.
alt. f. earlier pompon, pumpion f. obs. F po(m)pon f. L pepo -onis f. Gk pepon large melon: see PEPO