American Heritage® Dictionary of the English Language, Fourth Edition
- n. Any of various predatory flies of the family Asilidae, characteristically having long, bristly legs.
Century Dictionary and Cyclopedia
- n. Any dipterous insect of the family Asilidæ. They are large swift flies with strong proboscis, and prey upon other insects. They are also called
hornet-fliesand hawk-flies. The term robber-fly is taken direct from the German raubfliege. See cuts under Asilus, hawk-fly, and Promachus.
GNU Webster's 1913
- n. (Zoöl.) Same as Hornet fly, under Hornet.
- n. swift predatory fly having a strong body like a bee with the proboscis hardened for sucking juices of other insects captured on the wing
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