Source : Webster's Revised Unabridged Dictionary (1913)

Blowfly \Blow"fly`\, n. (Zo["o]l.)
   Any species of fly of the genus {Musca} that deposits its
   eggs or young larv[ae] (called flyblows and maggots) upon
   meat or other animal products.

Source : WordNet®

blowfly
     n : large usually hairy metallic blue or green fly; lays eggs in
         carrion or dung or wounds [syn: {blow fly}]