hemi

noun5

1. •
   A motor with hemispherical combustion chambers. A piston engine internal combustion engine with hemispherical piston cylinder heads.
2. •
   Domed versions of the above that have cylinder heads that are not exactly hemispherical
3. •
   A vehicle equipped with such a motor engine.
4. •
   A combustion chamber with the hemispherical cylinder head from such an engine.
5. •
   A hemispherical cylinder head from such a motor.