English Words Starting With A

• aerobium

  nounRare
  /ɛəˈrəʊbɪəm/An organism, typically a bacterium, that requires oxygen to live.
• aerobrake

  verb-intransitiveVery Low (technical)
  /ˈɛərəʊˌbreɪk/To slow down a spacecraft or other high-speed object by using the drag of a planet's or moon's atmosphere.
• aerobraking

  nounLow
  /ˈeərəʊˌbreɪkɪŋ/The process of slowing down a spacecraft using atmospheric drag.
• aeroculture

  nounVery Low
  /ˈeə.rəʊˌkʌl.tʃə(r)/The cultivation of plants without soil, using a mist environment.
• aerodonetics

  nounVery Rare (Obscure Technical Term)
  /ˌeərəʊdəʊˈnɛtɪks/The branch of aerodynamics concerned with the gliding flight of aircraft without power, especially the study of gliding.
• aerodontalgia

  nounRare/Technical
  /ˌeərəʊdɒnˈtældʒə/Tooth pain triggered by changes in atmospheric pressure, especially during air travel.
• aerodrome

  nounLow Frequency
  /ˈeə.rə.drəʊm/A defined area (including any buildings, installations, and equipment) on land or water intended to be used either wholly or in part for the arrival, departure, and surface movement of aircraft.
• aerodynamic braking

  nounC2
  /ˌeə.rəʊ.daɪˈnæm.ɪk ˈbreɪ.kɪŋ/The act of slowing a vehicle or aircraft by using its aerodynamic shape to increase drag, rather than applying mechanical brakes.
• aerodynamic trajectory

  nounC2
  /ˌeə.rəʊ.daɪˈnæm.ɪk trəˈdʒek.tər.i/The curved flight path of an object moving through the air, governed primarily by aerodynamic forces (like lift and drag) and gravity.
• aerodynamic wave drag

  nounVery Low (Extremely Technical)
  /ˌeə.rəʊ.daɪˈnæm.ɪk weɪv dræɡ/A type of drag (resistance) experienced by a body moving at transonic or supersonic speeds, caused by the formation of shock waves.
• aerodynamicist

  nounLow (Specialised)
  /ˌeə.rəʊ.daɪˈnæm.ɪ.sɪst/A specialist who studies the motion of air and other gases and their interaction with solid bodies in motion.
• aerodynamics

  nounC1
  /ˌeərəʊdaɪˈnæmɪks/The study of the properties of moving air and the interaction between the air and solid bodies moving through it.
• aerodyne

  nounVery Low
  /ˈeə.rə.daɪn/A heavier-than-air aircraft (like an aeroplane or helicopter) deriving lift from aerodynamic forces, as opposed to lighter-than-air craft (like balloons).
• aeroelastics

  nounVery low
  /ˌeə.rəʊ.ɪˈlæs.tɪks/The study or science of how aerodynamic forces interact with and affect the elastic deformation of structures, particularly in aircraft.
• aeroembolism

  nounVery Low
  /ˌeərəʊˈɛmbəlɪzəm/A medical condition resulting from the formation of gas bubbles (nitrogen) in the bloodstream and tissues due to a rapid reduction in surrounding pressure, typically experienced by deep-sea divers or aviators.
• aerofoil

  nounLow
  /ˈeə.rə.fɔɪl/A shaped surface designed to generate lift when air flows over it.
• aerogel

  nounC2
  /ˈeə.rə.dʒel/An extremely lightweight, porous, and low-density solid material made by replacing the liquid in a gel with a gas.
• aerogram

  nounLow
  /ˈeə.rə.ɡræm/A lightweight sheet of paper folded and sealed to form a self-contained letter for airmail, with postage pre-paid.
• aerogramme

  nounLow (Historical/Archaic)
  /ˈeərəɡræm/A lightweight, pre-stamped sheet of paper that can be folded and sealed to form an envelope for airmail.
• aerograph

  nounVery Low / Technical
  /ˈeə.rə.ɡrɑːf/A device for spraying ink, paint, or other fluids using compressed air; an airbrush.

Showing 1701–1720 of 8734 words.