trimotor [trahy-moh-ter] EXAMPLES|WORD ORIGIN noun an airplane or other vehicle that has three motors. Liberaldictionary.com
Origin of trimotor First recorded in 1920–25; tri- + motor Related formstri·mo·tored, adjective Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019 Examples from the Web for trimotor Historical Examples of trimotor
It was built of corrugated aluminum exactly like the Ford Trimotor.
The First Airplane Diesel Engine: Packard Model DR-980 of 1928
Robert B. Meyer