turboshaft

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tur·bo·shaft

 (tûr′bō-shăft′)
n.
A gas turbine engine that powers a rotating cylindrical shaft, as to a pump or a helicopter rotor.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

turboshaft

(ˈtɜːbəʊˌʃɑːft)
n
a propulsion system used mainly in helicopters and hovercraft, where the shaft is connected to a gearbox and transmits power from a gas turbine
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

tur•bo•shaft

(ˈtɜr boʊˌʃæft, -ˌʃɑft)
n.
a gas turbine used to deliver shaft power, as to a helicopter rotor. Also called tur′boshaft en`gine.
[1955–60]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
The Mi-8 AMTSh is a combat transport version of the Mi-17 helicopter, with more powerful turboshafts and portside tail rotor.
The Lakota is powered by two 738-horsepower Turbomeca Arriel turboshafts, carries eight soldiers in addition to its crew of two, has an empty weight of 1795 kg for a similar payload capacity and, quite importantly, has an operational ceiling of some 18,000 feet.
All turbine engine variants are discussed, including turbojets, turbofans, turboprops, turboshafts, auxiliary power units, and ramjets.
This would have two 1165-kW Rolls-Royce/Honeywell T800 turboshafts, a gross weight of 4265 kg, a 1360-kg payload and a cruise speed of 370 km/h at 20,000 ft.