any fleshy gourd fruit with a hard rind and many seeds, as the melon or squash
See pepo in American Heritage Dictionary 4
(pēˈpō)
nounpl.pe·pos
The fruit of any of various related plants, such as the cantaloupe, watermelon, cucumber, squash, pumpkin, and melon, having a hard or leathery rind, fleshy pulp, and numerous flattened seeds.