noun ·Rare ·Advanced level

Definitions

Noun

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

Synonyms

All synonyms

demidemi-halfhalf-hemi enginehemi head

Etymology

Clipping of hemisphere.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.