Meaning of hemi

hem•i

Pronunciation: (hem'ē), [key]
— n. Auto.
  1. an internal-combustion engine having hemispherical combustion chambers.

hemi-

Pronunciation: [key]
  1. a combining form meaning “half,” used in the formation of compound words: hemimorphic.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.