n.
Variant: or au · to · gy · ro
Pronunciation: ˌ o ̇ -t ō - ' j ī -( ˌ )r ō
Function: noun
Inflected Form: plural -ros
Etymology: from Autogiro, a trademark
Date: 1923
: a rotary-wing aircraft that employs a propeller for forward motion and a freely rotating rotor for lift
autogiro