Relying on an engine for propulsion in addition to muscle power(adjective)
WordNet. Princeton University. 2010.
Use "motor-assisted" in a sentence
"In another measure to improve fuel efficiency, the top three gear ratios in the transmission have been extended to ensure the engine runs at lower RPMs, the electric motor-assisted steering system reduces demands on the engine."
"For example, the top three gear ratios in the transmission have been extended to ensure the engine runs at lower RPMs, the electric motor-assisted steering system reduces demands on the engine, and low resistance tires further optimize fuel economy."
"This is Gene Stoltzfus's last essay, completed on Wednesday, March 10, 2010, just before he headed out on his beloved motor-assisted bicycle on the first spring day of the year."