fruit fly
US /ˈfruːt flaɪ/
UK /ˈfruːt flaɪ/

1.
a small fly, especially Drosophila melanogaster, which feeds on decaying fruit and is used extensively in genetic research.
:
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The rotting bananas attracted a swarm of fruit flies.
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Scientists often use fruit flies for genetic experiments due to their short life cycle.