Webster's English Dictionary

Enter the word to look up:

helicopter

he.li.cop.ter or he.li.copt \'hel-*-.ka:p-t*r, 'he--l*-\ \-.ka:pt\ n [F 
   he`licopte're, fr. Gk heliko- + pteron wing - more at]FEATHER : an aircraft 
   whose support in the air is derived from the reaction of a s tream of air 
   driven downward by one or more lifting rotors turning about substantially 
   vertical axes - he.li.copter vb