turboshaft
noun
tur·bo·shaft ˈtər-bō-ˌshaft 
: a gas turbine engine that is similar in operation to a turboprop engine but instead of being used to power a propeller is used through a transmission system for powering other devices (such as helicopter rotors and pumps)
Example Sentences
Recent Examples on the Web Unlike the 212, the Huey II remains a single-engine helicopter powered by a Honeywell T53-L-703 turboshaft engine with 1,800 shaft-horsepower. 
Eric Tegler, Forbes, 23 Dec. 2021 The power train will be hybrid in the sense of having electric lift rotor assemblies, while still employing turboshaft thrusters for the most efficient and longer-range flight. J. George Gorant, Robb Report, 23 Dec. 2021 The copter, with two Safran Arriel 2E turboshaft engines, is also designed for single-engine flight. Michael Verdon, Robb Report, 25 Apr. 2021 The new engines that replace the 4,500-hp Pratt & Whitney JFTD-12 turboshafts of the current helicopter are sourced from an as yet unnamed manufacturer. Eric Tegler, Popular Mechanics, 9 Mar. 2020
Eric Tegler, Forbes, 23 Dec. 2021 The power train will be hybrid in the sense of having electric lift rotor assemblies, while still employing turboshaft thrusters for the most efficient and longer-range flight. J. George Gorant, Robb Report, 23 Dec. 2021 The copter, with two Safran Arriel 2E turboshaft engines, is also designed for single-engine flight. Michael Verdon, Robb Report, 25 Apr. 2021 The new engines that replace the 4,500-hp Pratt & Whitney JFTD-12 turboshafts of the current helicopter are sourced from an as yet unnamed manufacturer. Eric Tegler, Popular Mechanics, 9 Mar. 2020 Word History
First Known Use
1958, in the meaning defined above