hemi-

1.
a combining form meaning “half,” used in the formation of compound words:
hemimorphic.
Origin
< Greek hēmi- half; cognate with Latin sēmi- semi-
British Dictionary definitions for hemi-

hemi-

prefix
1.
half: hemicycle, hemisphere Compare demi- (sense 1), semi- (sense 1)
Word Origin
from Latin, from Greek hēmi-
Word Origin and History for hemi-

word-forming element meaning "half," from Greek hemi- "half," from PIE root *semi-, which is the source of Sanskrit sami, Latin semi- (see semi-), Old High German sami- "half," and Old English sam-, denoting a partial or imperfect condition (see sandblind).

hemi- in Medicine

hemi- pref.
Half: hemicardia.

hemi- in Science
hemi-  
A prefix meaning "half," as in hemisphere, half a sphere.