late 14c., meloun, "herbaceous, succulent trailing annual plant," or its sweet, edible fruit, from Old French melon (13c.) and directly from Medieval Latin melonem (nominative melo), from Latin melopeponem, a kind of pumpkin, from Greek mēlopepon "gourd-apple" (name for several kinds of gourds bearing sweet fruit), from mēlon "apple" (see malic) + pepon, a kind of gourd, which is probably a noun use of pepon "ripe" (see pumpkin).

Among the earliest plants to be domesticated. In Greek, melon was used in a generic way for all foreign fruits (compare similar use of apple). The Greek plural of "melon" was used from ancient times for "a girl's breasts."

Roman goddess of fruit trees and their culture, from Latin pomum "apple; fruit," a word of uncertain origin. "Possibly from *po-emo- 'taken off, picked'; *po-omo- or *pe-omo- are also conceivable" [de Vaan]. Or perhaps borrowed from a lost Mediterranean language. Related: Pomonical.

Old English æpeltreow; see apple + tree (n.). Another name for it was Old English apuldore, which survived into Middle English and is preserved in place names (Appledore).

late 14c., pin-appel, "pine cone," from pine (n.) + apple. The reference to the fruit of the tropical plant (from resemblance of shape) is recorded by 1660s, and pine-cone emerged 1690s to replace pineapple in its original sense except in dialect. For "pine-cone," Old English also used pinhnyte "pine nut." Pine-apple also was used in a late 14c. Biblical translation for "pomegranate."