Quick definitions from WordNet (winter melon)
▸ noun: the fruit of the winter melon vine; a green melon with pale green to orange flesh that keeps well
▸ noun: any of a variety of muskmelon vines having fruit with a smooth white rind and white or greenish flesh that does not have a musky smell
▸ noun: the fruit of the winter melon vine; a green melon with pale green to orange flesh that keeps well
▸ noun: any of a variety of muskmelon vines having fruit with a smooth white rind and white or greenish flesh that does not have a musky smell