English Words Starting With A

• atmospheric electricity

  nounLow
  /ˌætməsˈfɛrɪk ɪlɛkˈtrɪsɪti/Electrical phenomena occurring naturally in the Earth's atmosphere, including lightning, static electricity, and the fair-weather electric field.
• atmospheric engine

  nounC2 / Very Low-Frequency / Technical-Historical
  /ˌætməsˈfɛrɪk ˈɛnʤɪn/An early type of steam engine where the downward power stroke is driven by atmospheric pressure acting on a piston, following the creation of a vacuum by condensing steam.
• atmospheric perspective

  nounC1/C2
  /ˌætməsˌferɪk pəˈspektɪv/A visual technique in painting and drawing where distant objects appear less distinct, bluer, and lighter in color than closer objects, simulating the effect of the atmosphere on perception.
• atmospheric pressure

  nounB2
  /ˌætməsˌferɪk ˈpreʃə/The force exerted by the weight of the Earth's atmosphere on a unit area of surface.
• atmospheric river

  nounC1
  /ˌætməsˌfɛrɪk ˈrɪvə/A long, narrow corridor in the atmosphere that transports concentrated water vapour from tropical or subtropical regions, causing intense precipitation when it makes landfall.
• atmospheric tide

  nounC2 / Very Low Frequency (Specialist Technical Term)
  /ˌæt.məsˈfer.ɪk ˈtaɪd/A large-scale, periodic fluctuation in the Earth's atmosphere, analogous to oceanic tides, caused primarily by the gravitational pull of the Moon and Sun, and by solar heating.
• atmospheric window

  nounC2
  /ˌætməsˈfɛrɪk ˈwɪndəʊ/A range of wavelengths in the electromagnetic spectrum to which the Earth's atmosphere is transparent, allowing radiation to pass through into space.
• atmospherics

  nounplural-nounC1
  /ˌatməsˈfɛrɪks/Electrical disturbances in the atmosphere that cause interference with radio or electronic signals.
• atmospherium

  nounVery Low
  /ˌætməsˈfɪəriəm/A specialized facility or building designed for simulating and studying atmospheric conditions, often used for scientific research or educational demonstrations.
• atole

  nounLow
  /əˈtəʊleɪ/A traditional Mesoamerican hot beverage made from masa (corn dough) or corn flour, water, and flavorings like cinnamon or vanilla.
• atoll

  nounLow
  /ˈæt.ɒl/A ring-shaped coral reef, island, or series of islets encircling a lagoon, often formed around a sunken volcanic island.
• atom

  nounC1
  /ˈætəm/The smallest unit of a chemical element, consisting of a nucleus of protons and neutrons with electrons orbiting around it.
• atom smasher

  nounLow
  /ˈæt.əm ˌsmæʃ.ər/A colloquial name for a particle accelerator; a device that propels charged particles to high speeds and energies to smash atoms or subatomic particles, typically for research purposes.
• atom trap

  nounLow
  /ˈatəm ˌtrap/A device or method for confining and isolating individual atoms or small groups of atoms, typically using electromagnetic fields or optical techniques, for study and manipulation.
• atom-bomb

  verb-intransitiveverb-transitiveC1
  /ˈætəm bɒm/An extremely powerful explosive weapon that derives its destructive force from nuclear fission.
• atomic age

  nounC1+ / Low-frequency, domain-specific
  /əˌtɒm.ɪk ˈeɪdʒ/A historical period beginning after World War II, marked by the development and potential use of atomic/nuclear weapons, and the societal, political, and technological changes this caused.
• atomic bomb

  nounB2
  /əˌtɒm.ɪk ˈbɒm/A powerful explosive weapon whose energy is derived from the nuclear fission of heavy atomic nuclei, releasing enormous destructive force.
• atomic clock

  nounB2
  /əˌtɒm.ɪk ˈklɒk/An extremely precise timekeeping device that uses the vibration frequency of atoms (typically caesium or rubidium) as its time standard.
• atomic cocktail

  nounLow
  /əˌtɒm.ɪk ˈkɒk.teɪl/A potent mixed drink, especially one with a significant amount of alcohol or stimulating ingredients.
• atomic energy

  nounC1
  /əˌtɒm.ɪk ˈen.ə.dʒi/The powerful energy released from the nucleus of an atom during nuclear fission or fusion, used to generate electricity.

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