Meaning

noun any of several cultivated sour cherry trees bearing fruit with dark skin and juice

noun cultivated sour cherry with dark-colored skin and juice

originProbably either: * an alteration of morel with Italian -ello substituted for the ending, perhaps after Italian morello (“dark-coloured”); or * from Italian amarello and/or Dutch amarelle, marelle, both from Medieval Latin amārellum, from Latin amārus + -ellum.

Etymology from Wiktionary, CC BY-SA 3.0