Noun black fly has 1 sense
  1. blackfly, bean aphid, Aphis fabae - blackish aphid that infests e.g. beans and sugar beets
    --1 is a kind of gnat; aphid
    --1 is a member of
     Simulium, genus Simulium; 1 of 2 senses of blackfly ; blackfly, bean aphid, Aphis fabae; Aphis, genus Aphis
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