English Words Starting With O

• ockham's razor

  nounC1/C2
  /ˈɒkəmz ˈreɪzə/A principle of problem-solving which states that, among competing hypotheses, the one with the fewest assumptions should be selected.
• ockodols

  plural-nounNon-existent (N/A)
  N/AThe word 'ockodols' is not an established word in the English language. It has no standard lexical entry, core meaning, or usage in any major dictionary, corpus, or dialect of English.
• ocmulgee

  nounVery Low
  /ɒkˈmʌlɡiː/A proper noun referring to a river in the U.S. state of Georgia, or to historical Native American sites and peoples associated with that region.
• oconee-bells

  nounRare
  /əʊˈkəʊniː bɛlz/A rare, perennial flowering plant (Shortia galacifolia) native to a small region of the southeastern United States, known for its nodding, bell-shaped white flowers.
• ocotillo

  nounLow
  /ˌɒkəˈtiː(j)əʊ/A spiny, slender-stemmed desert shrub native to the Southwestern United States and Mexico, known for producing bright red tubular flowers after rainfall.
• ocrea

  nounVery Low
  /ˈɒkrɪə/A sheath or legging, especially one made of leather or metal, worn by ancient Roman soldiers to protect the lower leg.
• octa-

  nounLow (C1+)
  /ˈɒk.tə/A prefix derived from Greek and Latin meaning 'eight'.
• octachord

  nounVery Low
  /ˈɒktəkɔːd/A musical instrument with eight strings.
• octad

  nounC2
  /ˈɒk.tæd/A group or set of eight.
• octadecanoic acid

  nounVery Low
  /ˌɒktəˌdeɪkəˈnəʊɪk ˈæsɪd/The systematic chemical name for a saturated fatty acid with 18 carbon atoms.
• octagon

  nounB2
  /ˈɒk.tə.ɡən/A plane geometric figure with eight straight sides and eight angles.
• octagon house

  nounLow
  /ˈɒk.tə.ɡən ˌhaʊs/A house with an eight-sided floor plan, typically built in the mid-19th century United States.
• octagon scale

  nounVery Low (C2/Technical)
  /ˈɒk.tə.ɡɒn skeɪl/A geometric pattern or structure composed of eight segments or facets arranged around a central axis, resembling the shape of an octagon in its layered, scaled form.
• octahedrite

  nounVery Low
  /ˌɒktəˈhiːdraɪt/A mineralogical term for a common iron-nickel alloy found in meteorites, characterized by a specific crystalline structure.
• octahedron

  nounC1
  /ˌɒk.təˈhiː.drən/A three-dimensional geometric solid with eight plane faces, especially eight equilateral triangles.
• octal

  adjectivenounC1
  /ˈɒk.təl/A numeral system with a base of eight, using digits 0-7.
• octal notation

  nounC1
  /ˈɒk.təl nəʊˈteɪ.ʃən/A numeral system with base 8, using digits 0–7 to represent numbers, often used in computing.
• octamer

  nounLow
  /ˈɒktəmə/A molecule or complex composed of eight subunits, especially a sequence of eight nucleotides or a protein complex of eight monomers.
• octameter

  adjectivenounLow
  /ɒkˈtæm.ɪ.tə/A line of verse consisting of eight metrical feet.
• octan

  adjectivenounC2 (Very Rare / Specialist)
  /ˈɒk.tən/An interval of eight days, often used in ecclesiastical contexts to denote the feast itself, its octave, or a recurring event happening every eight days.

Showing 361–380 of 3187 words.