WordReference Random House Unabridged Dictionary of American English © 2025
I′-head en′gine
(ī′hed′),USA pronunciation
- Automotivean internal-combustion engine with both intake and exhaust valves placed directly above the piston. Also called overhead-valve engine, valve-in-head engine.
'I-head engine' also found in these entries (note: many are not synonyms or translations):