English Words Starting With O

• ocean liner

  nounB2
  /ˈəʊʃən ˈlaɪnə(r)/A large passenger ship designed for voyages across oceans.
• ocean marine insurance

  nounLow (Specialized Term)
  /ˈəʊʃən məˈriːn ɪnˈʃʊərəns/A type of insurance that covers vessels, cargo, terminals, and any transport or property by which cargo is transferred, acquired, or held between the points of origin and final destination, specifically in the context of ocean-going voyages.
• ocean of storms

  nounVery low
  /ˈəʊ.ʃən əv stɔːmz/A large, dark basaltic plain on the Moon's surface, specifically referring to the Mare Imbrium.
• ocean pout

  nounLow
  /ˈəʊʃən paʊt/A bottom-dwelling marine fish (Zoarces americanus) found in the northwest Atlantic Ocean, known for its eel-like appearance and ability to survive in cold waters.
• ocean springs

  nounVery Low (as a unit, primarily used in geographic contexts)
  /ˈəʊʃən sprɪŋz/A proper noun referring specifically to a city on the Mississippi Gulf Coast in the United States.
• ocean sunfish

  nounLow
  /ˈəʊʃən ˈsʌnfɪʃ/A large, distinctive marine fish (Mola mola) with a flattened, disc-shaped body, tall dorsal and anal fins, and a truncated tail.
• oceanarium

  nounC2
  /ˌəʊʃɪˈnɛːrɪəm/a large public aquarium containing marine animals, especially large sea creatures like sharks, dolphins, or sea turtles, in simulated ocean habitats.
• oceanaut

  nounLow
  /ˈəʊʃənɔːt/A person who explores or lives underwater, especially in a submersible or underwater habitat.
• oceanfront

  adjectivenounB2
  /ˈəʊʃ(ə)nfrʌnt/The strip of land directly facing and bordering an ocean.
• oceania

  nounC1
  /ˌəʊ.siˈɑː.ni.ə/A collective name for the islands of the Pacific Ocean, including Australia, New Zealand, Melanesia, Micronesia, and Polynesia.
• oceanic ridge

  nounC2
  /ˌəʊʃiˈænɪk rɪdʒ/A long, continuous, seismically active mountain range on the ocean floor, formed by plate tectonics where new oceanic crust is created.
• oceanic trench

  nounC2
  /ˌəʊʃiˈænɪk ˈtrenʧ/A long, deep, steep-sided depression in the ocean floor formed by the subduction of tectonic plates.
• oceanicity

  nounC2
  /ˌəʊʃɪəˈnɪsɪti/The degree to which a climate is influenced by proximity to the ocean, characterized by milder, wetter conditions.
• oceanid

  nounC2 (Very low frequency / Very rare)
  /əʊˈsiːənɪd/A sea nymph in Greek mythology; any of the many daughters of Oceanus and Tethys.
• oceanography

  nounLow
  /ˌəʊʃəˈnɒɡrəfi/The scientific study of the ocean, including its physical properties, boundaries, and the life within it.
• oceanology

  nounLow
  /ˌəʊʃəˈnɒlədʒi/The scientific study of the oceans, including their physical and biological properties, processes, and phenomena.
• oceanside

  nounB1
  /ˈəʊ.ʃən.saɪd/The area of land immediately adjacent to an ocean; the shore.
• oceanus

  nounVery Low
  /əʊˈsiːənəs/A proper noun from Greek mythology referring to the Titan who personified the world-ocean, a great river encircling the earth.
• oceanus procellarum

  nounVery Low
  /əʊˈsiːənəs ˌprɒsɛˈlɑːrəm/The proper Latin name for a prominent, dark basaltic plain on the Moon, meaning 'Ocean of Storms'.
• ocellated turkey

  nounC1/C2
  /əʊˈsɛleɪtɪd ˈtɜːki/A species of turkey native to the Yucatán Peninsula, distinguished by its iridescent bronze-green and copper plumage and blue 'eye' spots on its tail.

Showing 321–340 of 3187 words.