from The American Heritage® Dictionary of the English Language, 4th Edition

  • Half: hemihedral.
  • Partial; partially: hemiparasite.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • Half.

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.

    The Edge of Evolution


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