trirotor

== English == === Etymology === From tri- + rotor. Late 19th to early 20th century, originally with reference to pumps. === Adjective === trirotor (not comparable) (engineering, technology, of pumps, helicopters, or drones) Having three rotors; having three main rotors. Alternative form: tri-rotor Coordinate terms: monorotor, birotor, quadrirotor, quadrotor ==== Related terms ==== === Noun === trirotor (plural trirotors) A pump or rotorcraft with three rotors or three main rotors. Coordinate terms: monorotor, birotor, quadrotor