Wiktionary
banana-shaped
a. Having a shape like that of a banana.
Usage examples of "banana-shaped".
Their assignments included overflying such sensitive locations as Novaya Zemlya, the banana-shaped island where Russia carried out its most secret atomic tests.
It was impossible to be precise, because the discovery that the purplish banana-shaped wrigglers and the mosquitoid creatures the size of a roc were simply sexually dimorphic versions of the same being cast doubt on all calculations.