WORD ORIGIN a combining form meaning “half,” used in the formation of compound words: hemimorphic. Origin of hemi-
half; cognate with
Latin sēmi- semi-
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for hemi- Word Origin for hemi-
from Latin, from Greek
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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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).
Online Etymology Dictionary, © 2010 Douglas Harper
Medicine definitions for hemi-
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Science definitions for hemi- A prefix meaning half, as in hemisphere, half a sphere.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.