English Words Starting With R

• radiotechnology

  nounVery low frequency
  /ˌreɪdiəʊtɛkˈnɒlədʒi/The branch of technology concerned with the use of radio waves, especially for communication and broadcasting.
• radiotelegram

  nounVery Low
  /ˌreɪdiəʊˈtɛlɪɡræm/A message, especially a formal one, transmitted via radiotelegraphy.
• radiotelegraph

  nounverbverb-ambitransitiveVery low
  /ˌreɪdiəʊˈtɛlɪɡrɑːf/A system for transmitting telegraphic messages using radio waves instead of wires.
• radiotelegraphy

  nounVery Low
  /ˌreɪ.di.əʊ.təˈlɛɡ.rə.fi/The technology of transmitting messages by radio using Morse code or other coded signals, without voice.
• radiotelemetry

  nounLow
  /ˌreɪ.di.əʊ.təˈlem.ɪ.tri/The automated measurement and transmission of data from remote or inaccessible sources to a receiving station for monitoring and analysis.
• radiotelephone

  nounverbverb-ambitransitiveLow
  /ˌreɪdiəʊˈtɛlɪfəʊn/A telephone that transmits and receives signals via radio waves rather than through wires.
• radiotelephony

  nounC2
  /ˌreɪ.di.əʊ.təˈlef.ə.ni/The technology or system for transmitting voice communications over radio waves, rather than through wires.
• radioteletype

  nounC2
  /ˌreɪ.di.əʊˈtel.ɪ.taɪp/A telecommunications system for transmitting typed messages over radio waves.
• radiotherapy

  nounC1
  /ˌreɪ.di.əʊˈθer.ə.pi/The treatment of disease, especially cancer, using X-rays or other forms of radiation.
• radiothermy

  nounVery Rare / Technical
  /ˌreɪ.di.əʊ.ˈθɜː.mi/A therapeutic medical treatment using heat generated by radiant energy, such as short-wave radio waves or infrared radiation.
• radiothon

  nounLow
  /ˈreɪ.di.əʊ.θɒn/A long, continuous radio broadcast organized to raise funds for a charitable cause.
• radiothorium

  nounVery Low
  /ˌreɪ.di.əʊˈθɔː.ri.əm/An isotope of thorium with radioactive properties, specifically thorium-228.
• radiotracer

  nounLow
  /ˈreɪdiəʊˌtreɪsə/A radioactive substance used to track the movement or distribution of materials in a system.
• radiotransparent

  nounVery low (specialized)
  /ˌreɪdiəʊtrænsˈpærənt/Allowing radio waves to pass through without significant absorption or reflection.
• radiovision

  nounVery Low
  /ˌreɪ.di.əʊˈvɪʒ.ən/An early term for a system of transmitting both sound and images wirelessly, a precursor to television.
• radish

  nounB1
  /ˈradɪʃ/A small, round or elongated, pungent-tasting, edible root vegetable, typically red or white, eaten raw in salads.
• radisson

  nounMedium (context-specific)
  /ˈræd.ɪ.sən/A major international hotel and hospitality group, or a specific hotel bearing that name.
• radium

  nounC1/C2
  /ˈreɪdiəm/A rare, highly radioactive metallic chemical element discovered by Marie Curie, used historically in luminous paint and cancer treatment.
• radium a

  nounC2
  /ˈreɪdiəm/A highly radioactive metallic chemical element, discovered by Marie and Pierre Curie in 1898, used historically in luminous paints and cancer treatment.
• radium b

  nounC1/C2 (Specialized/Technical)
  /ˈreɪ.di.əm/A highly radioactive metallic chemical element (symbol Ra) discovered by Marie and Pierre Curie, used historically in medical treatments and luminous paints.

Showing 321–340 of 5802 words.