melon (n.) Look up melon at
late 14c., from Old French melon (13c.), from Medieval Latin melonem (nominative melo), from Latin melopeponem, a kind of pumpkin, from Greek melopepon "gourd-apple" (name for several kinds of gourds bearing sweet fruit), from melon "apple" (see malic) + pepon, a kind of gourd, probably noun use of pepon "ripe" (see pumpkin).

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."