English Words Starting With O

• oecus

  nounRare/Technical
  /ˈiːkəs/A large reception room or hall in an ancient Roman house.
• oedema

  nounC1/C2 (High in technical medical contexts, low in general usage)
  /ɪˈdiː.mə/A medical condition characterised by the accumulation of excess watery fluid in the body's tissues, causing swelling.
• oedipus

  nounLow (common in literary, academic, and psychological contexts, rare in everyday speech)
  /ˈiːdɪpəs/The name of the tragic hero in Greek mythology who unknowingly killed his father and married his mother.
• oedipus at colonus

  nounVery Low
  /ˈiːdɪpəs æt kəˈləʊnəs/A tragedy by Sophocles, one of the three Theban plays, detailing the final days and apotheosis of the blinded king Oedipus.
• oedipus complex

  nounLow. Primarily used in academic, clinical, and intellectual discussions.
  /ˈiːdɪpəs ˌkɒmpleks/In Freudian psychoanalytic theory, the childhood desire to sexually possess the parent of the opposite sex and eliminate the parent of the same sex.
• oedipus rex

  nounC2
  /ˈiːdɪpəs ˈrɛks/The title of the ancient Greek tragedy by Sophocles, literally meaning "Oedipus the King".
• oedometer

  nounVery Low
  /iːˈdɒmɪtə/A device used in soil mechanics and geotechnical engineering to measure the consolidation properties of soil samples.
• oehlenschlager

  nounC2 - Proper Noun
  /ˈɜːlənˌʃlɑːɡə/A surname of German origin, most notably referring to the prominent Danish Romantic poet and playwright Adam Oehlenschläger.
• oeil-de-boeuf

  nounLow
  /ˌɜːj də ˈbɜːf/A small round or oval window, typically found in architecture.
• oeillade

  nounVery Low
  /ˈəɪjɑːd/A flirtatious glance, an amorous look.
• oeneus

  nounExtremely Low / Archaic / Specialized
  /ˈiːniːəs/A figure from Greek mythology, a king of Calydon, father of Meleager, Deianeira, and Tydeus, associated with viticulture and often mentioned in the context of the Calydonian Boar Hunt.
• oenochoe

  nounVery low
  /ˈiːnəʊkəʊi/A type of ancient Greek wine jug with a single handle and a trefoil-shaped mouth.
• oenology

  nounLow
  /iːˈnɒlədʒi/The scientific study of wines and winemaking.
• oenomel

  nounRare / Obsolete
  /ˈiːnə(ʊ)mɛl/A drink made from wine and honey, historically consumed in ancient Greece.
• oenone

  nounExtremely Low
  /iːˈnəʊni/A nymph in Greek mythology who was the first wife of Paris before he abducted Helen.
• oenophile

  nounLow Frequency
  /ˈiːnə(ʊ)fʌɪl/A person who enjoys and has extensive knowledge of wines.
• oenothera

  nounC1
  /ˌiːnəˈθɪərə/A genus of flowering plants, primarily known for their evening-blooming yellow or pink flowers.
• oersted

  nounRare
  /ˈɜː.sted/The CGS (centimetre-gram-second) unit of magnetic field strength (H-field).
• oerter

  nounZ (Extremely rare/archaic/obsolete)
  /ˈɔːtə/A very uncommon, archaic word meaning 'a person from the north' or 'a northerner'. It is the obsolete comparative form of 'oert', an archaic term meaning 'northern'.
• oesel

  nounExtremely Rare / Obsolete / Dialectal
  /ˈəʊzəl/ or /ˈiːzəl/An obsolete or dialectal term for a donkey, ass, or mule; sometimes used to mean a stupid person.

Showing 501–520 of 3187 words.