The story
From melon + -al. Blend of melon + heptenal. From melon heptenal, from melon aldehyde, from being a heptene-based aldehyde that smells like melons.
Etymology from Wiktionary, CC BY-SA 4.0.
melonal
Today it means: A melon-smelling scent compound found in nature and synthesized for perfuming, that in its pure form is a clear pale yellow liquid. Full definition →