1. blackfly

noun. small blackish stout-bodied biting fly having aquatic larvae; sucks the blood of birds as well as humans and other mammals.


  • gnat
  • black fly
  • genus Simulium
  • Simulium

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2. blackfly

noun. blackish aphid that infests e.g. beans and sugar beets.


  • Aphis
  • Aphis fabae
  • bean aphid
  • genus Aphis

Sentences with blackfly

1. Noun, singular or mass
Look for tiny black insects and spiral formations of eggs on the undersides of the lemon tree’s leaves to identify a blackfly infestation.

2. Verb, base form
Black aphids or blackfly infest the young leaves and flower shoots of succulents.