hemi-head

American  

[hem-i-hed] / ˈhɛm ɪˌhɛd /

Or hemihead

noun

1. a cylinder head having hemispherical combustion chambers.

2. an engine having such a cylinder head; a hemi.

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adjective

1. of or relating to such an engine.

   a hemi-head V-eight.

Etymology

Origin of hemi-head

First recorded in 1960–65

Example Sentences

Hidden under the electric-blue hood of Petty's Plymouth Belvedere GTX was a 426-cu.-in. "hemi-head" racing engine that generated 520 h.p. and burned gasoline at the rate of a gallon every three miles.

From Time Magazine Archive

Chrysler hemi-head engine with Triple GMC 671 blowers.

From Time Magazine Archive

Driving a 1966 Plymouth with a special 550-h.p. "hemi-head" engine, Petty overtook Cale Yarborough's Ford on the 113th lap, led the rest of the way at an average 160.6 m.p.h.

From Time Magazine Archive