drone (n.) Look up drone at Dictionary.com
O.E. dran, dræn "male honeybee," from P.Gmc. *dran-, probably imitative; given a figurative sense of "idler, lazy worker" (male bees make no honey) c.1529; the verb in the sound sense is c.1500, apparently imitative. Meaning "pilotless aircraft" is from 1946.