homo-

prefix

Same, identical.

Opposite

Meanings

homo-1

prefix

alternative hom-

homo-2

prefix

alternative hom-

  1. Of or pertaining to homosexuality or same-sex relations.

homo-3

prefix

alternative hom-

  1. chemistryUsed to form the names of compounds derived from simpler ones by addition of a methylene group.

Synonyms & antonyms

prefixSame, identical.

antonym(s) of “identical”

Opposite

Origin

homo- · prefix

  1. Proto-Indo-European*sem-
  2. Proto-Indo-European*somHós
  3. Proto-Hellenic*homós
  4. Ancient Greekὁμός (homós)
  5. Englishhomo-

From Ancient Greek ὁμός (homós, “same”). By surface analysis, hom- + -o-.

Full word history & related roots →

homo- · prefix

  1. Proto-Indo-European*sem-
  2. Proto-Indo-European*somHós
  3. Proto-Hellenic*homós
  4. Ancient Greekὁμός (homós)
  5. Germanhomo-
  6. Proto-Indo-European*sek-
  7. Proto-Indo-European*séks-u-s
  8. Proto-Italic*seksus
  9. Proto-Indo-European*sek-
  10. Proto-Indo-European*sékh₁yeti
  11. Proto-Italic*sekaō
  12. Latinsecō
  13. Latinsecāre?
  14. Latinsexus
  15. Proto-Indo-European*h₂el-
  16. Proto-Indo-European*h₂élisder.?
  17. Latinsexuālis
  18. Germansexual
  19. Germanhomosexua
  20. Englishhomosexualbf.
  21. Englishhomo-

Back-formation from homosexual, ultimately from Ancient Greek ὁμός (homós, “same”).

Full word history & related roots →

homo- · prefix

  1. Ancient Greekὁμός“same”
  2. Englishhomo-

Back-formation from homologue, ultimately from Ancient Greek ὁμός (homós, “same”).

Full word history & related roots →

Translations

Catalan homo-
  • homo-Same
French homo-
  • homo-Same
German homo-
  • homo-Same
Greek ομο-, ομό-
  • ομο- (omo-)Same
  • ομό- (omó-)Same
Indonesian homo-
  • homo-Same
Latvian homo-
  • homo-Same
Lithuanian homo-
  • homo-Same
Polish homo-, izo-
  • homo-Same
  • izo-Same
Portuguese homo-
  • homo-Same
Russian гомо-
  • гомо- (gomo-)Same
Spanish homo-
  • homo-Same
Cite this entry
APA

homo-. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/homo-

MLA

“homo-.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/homo-. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “homo-,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/homo-.

Source: homo- on Wiktionary, CC BY-SA 4.0.