English Words Starting With O

• organization of african unity

  nounLow
  /ˌɔːɡənaɪˈzeɪʃən əv ˈæfrɪkən juːˈnɪtɪ/The intergovernmental organization of African states established in 1963 to promote unity, solidarity, and cooperation among African nations.
• organization of american states

  nounLow
  /ˌɔː.ɡə.naɪˈzeɪ.ʃən əv əˈmer.ɪ.kən steɪts/A regional international organization comprising the countries of North, Central, and South America and the Caribbean, founded to promote cooperation and dialogue among member states.
• organization of petroleum exporting countries

  nounC1/C2
  /ˌɔːɡənaɪˈzeɪʃn əv pəˈtrəʊliəm ɪkˈspɔːtɪŋ ˈkʌntriz/An international intergovernmental organization of 13 oil-exporting nations, founded to coordinate and unify petroleum policies among member countries.
• organizational culture

  nounC1
  /ˌɔː.ɡə.naɪˈzeɪ.ʃən.əl ˈkʌl.tʃər/The shared values, beliefs, assumptions, norms, and behaviors that characterize how an organization functions and how its members interact.
• organizational psychology

  nounLow to Medium
  /ˌɔːɡənaɪˈzeɪʃənl saɪˈkɒlədʒi/The scientific study of individual and group behavior in work settings, aiming to improve workplace effectiveness, health, and well-being.
• organize

  verbverb-intransitiveverb-transitiveC1
  /ˈɔː.ɡən.aɪz/To arrange or order things systematically; to make something structured and functional.
• organized

  adjectiveverbB1
  /ˈɔː.ɡə.naɪzd/Arranged in a systematic or efficient way; having things in order.
• organized labor

  nounC1
  /ˈɔː.ɡə.naɪzd ˈleɪ.bər/Workers who are members of trade unions, acting collectively through those unions to negotiate with employers over wages, conditions, and rights.
• organized militia

  nounC2
  /ˈɔː.ɡə.naɪzd mɪˈlɪʃ.ə/A formally established, trained, and regulated military force composed of citizens, distinct from a professional standing army, often authorized by law for state defense or emergency response.
• organizer

  nounB2
  /ˈɔː.ɡən.aɪ.zə/A person who makes arrangements, plans, and coordinates events or systems; an item used to keep things in order.
• organogenesis

  nounC2
  /ˌɔː.ɡən.əʊˈdʒen.ə.sɪs/The formation and development of organs in a living organism.
• organogram

  nounC1
  /ˈɔː.ɡən.əʊ.ɡræm/A visual diagram that shows the internal structure and hierarchical relationships within an organization.
• organography

  nounVery low (specialist technical term)
  /ˌɔː.ɡəˈnɒɡ.rə.fi/The scientific description of the organs of living organisms, particularly in botany and anatomy.
• organology

  nounC2
  /ˌɔː.ɡənˈɒl.ə.dʒi/The scientific study of musical instruments, their classification, history, and construction.
• organon

  nounC2
  /ˈɔːɡənɒn/A set of principles, a system, or a body of ideas used for investigation, reasoning, or inquiry.
• organophosphate

  nounC1-C2 / Specialised
  /ˌɔː.ɡə.nəʊˈfɒs.feɪt/A synthetic organic compound containing phosphorus, used primarily as an insecticide, herbicide, or nerve agent.
• organotherapy

  nounVery low frequency (highly technical, historical)
  /ˌɔː.ɡə.nəʊˈθer.ə.pi/The historical medical treatment of disease using animal organ extracts.
• organotropism

  nounVery Rare/Specialized
  /ˌɔː.ɡə.nəʊˈtrəʊ.pɪ.zəm/The selective affinity or attraction of something (especially a chemical agent or pathogen) for a specific organ or tissue in the body.
• organum

  nounC2
  /ˈɔːɡənəm/A style of early polyphonic music from the 9th to 13th centuries, where a plainchant melody is accompanied by one or more additional voice parts moving in parallel motion.
• organza

  nounC1
  /ɔːˈɡæn.zə/A thin, stiff, sheer fabric made from silk, nylon, or polyester, often used for formal wear and evening dresses.

Showing 1881–1900 of 3187 words.