English Words Starting With O

• otocyst

  nounVery Low
  /ˈəʊtəʊsɪst/A hollow embryonic structure in vertebrates that develops into the inner ear.
• otoe

  nounExtremely Rare / Non-Standard / Proper Noun
  /ˈəʊtəʊ/There is no established, standard word 'otoe' in the English language. It appears to be a potential typo, a non-standard term, or a proper noun (e.g., a surname or a river name).
• otolaryngology

  nounC1
  /ˌəʊ.təʊˌlær.ɪŋˈɡɒl.ə.dʒi/The branch of medicine dealing with the ear, nose, and throat and related structures of the head and neck.
• otolith

  nounC2
  /ˈəʊ.tə.lɪθ/A small, calcified structure in the inner ear of vertebrates, used in sensing balance and orientation.
• otology

  nounC2/Technical/Low
  /əʊˈtɒl.ə.dʒi/The branch of medicine dealing with the anatomy, function, and diseases of the ear.
• otomi

  adjectivenounLow (specialist/anthropological/geographical contexts)
  /ɒˈtəʊmi/A member of an indigenous people of central Mexico.
• otoplasty

  nounLow
  /ˈəʊtə(ʊ)ˌplasti/Surgery performed on the external ear.
• otorhinolaryngology

  nounVery Low (C2)
  /ˌəʊtə(ʊ)ˌraɪnəʊˌlærɪŋˈɡɒlədʒi/The medical specialty concerned with diseases and disorders of the ear, nose, and throat (ENT).
• otorrhea

  nounC2+
  /ˌəʊ.təʊˈriː.ə/Discharge from the ear.
• otorrhoea

  nounVery Low
  /ˌəʊ.təʊ.ˈriː.ə/Discharge from the ear.
• otosclerosis

  nounLow. A specialised medical term.
  /ˌəʊ.təʊ.sklɪəˈrəʊ.sɪs/A medical condition characterized by abnormal bone growth in the middle ear, leading to progressive hearing loss.
• otoscope

  nounLow
  /ˈəʊ.tə.skəʊp/A medical instrument used by doctors to examine the inside of the ear.
• otranto

  nounC1/C2
  /ɒˈtræntəʊ/A coastal town in southern Italy, located in the Apulia region, known historically as a port and for its castle.
• otsu

  nounVery Low
  /ˈɒt.suː/A city in Japan, the capital of Shiga Prefecture, located on the southern shore of Lake Biwa.
• ottar

  nounLow/Rare
  /ˈɒt.ɑː/An essential oil, particularly one derived from rose petals.
• ottava

  adverbnounLow
  /ɒˈtɑːvə/A musical direction indicating that a passage should be played an octave higher or lower than written.
• ottava rima

  nounC2+
  /ɒˌtɑːvə ˈriːmə/An Italian stanza form consisting of eight lines of iambic pentameter, rhyming abababcc.
• ottawa

  nounB1
  /ˈɒt.ə.wə/The capital city of Canada.
• otter

  nounverbC1
  /ˈɒt.ər/A semi-aquatic carnivorous mammal of the weasel family, with a long slender body, short legs, a thick tapering tail, and webbed feet, known for living in and near water.
• otter board

  nounVery Low Frequency / Technical
  /ˈɒtə ˌbɔːd/A flat, weighted board or panel, typically made of wood or metal, used in fishing trawls to spread the mouth of the net open horizontally underwater.

Showing 2321–2340 of 3187 words.