Hemi

Origin

Full definition of hemi

Noun

1. (automotive) An motor with hemispherical combustion chamber. A piston engine internal combustion engine with hemispherical piston cylinder head.
2. (automotive) A combustion chamber with the hemispherical cylinder head from such an engine.
3. (automotive) A hemispherical cylinder head from such a motor.
4. (automotive) A vehicle equipped with such a motor engine.
5. (by extension) dome versions of the above that have cylinder heads that are not exactly hemispherical

Synonyms

• (engine motor) hemi engine
• (cylinder head) hemi head