from The American Heritage® Dictionary of the English Language, 4th Edition
- Half: hemihedral.
- Partial; partially: hemiparasite.
from Wiktionary, Creative Commons Attribution/Share-Alike License
from the GNU version of the Collaborative International Dictionary of English
- A prefix signifying half.
from The Century Dictionary and Cyclopedia
- n. Half: a prefix used in many compound words derived from the Greek. It is cognate with Latin semi-, and equivalent to French demi-.
Greek hēmi-; see sēmi- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek prefix ἡμι- (hēmi-, "half"), from ἥμισυς (hēmisus, "half") (Wiktionary)
Natural selection of hemi- and heterozygotes for G6PD deficiency in Africa by resistance to severe malaria.