English Words Starting With A

• autophyte

  nounVery Low
  /ˈɔːtə(ʊ)faɪt/A plant that produces its own food through photosynthesis.
• autopilot

  nounB2
  /ˈɔː.təʊˌpaɪ.lət/A device that automatically steers a vehicle (aircraft, ship, car) on a set course without constant human control.
• autopista

  nounB1
  /ˈɔːtəʊˌpiːstə/A main road designed for fast travel, typically with multiple lanes in each direction, grade-separated junctions, and limited access.
• autoplast

  nounVery Low (Rare, Technical)
  /ˈɔː.təʊ.plɑːst/Surgical repair or grafting using the patient's own tissues.
• autoplasty

  nounVery Low
  /ˈɔː.təʊˌplæs.ti/A surgical procedure that involves grafting tissue from one part of a person's own body to another part.
• autopolyploid

  adjectivenounC2
  /ˌɔːtəʊˈpɒlɪplɔɪd/An organism or cell that has more than two complete sets of chromosomes, all derived from the same species.
• autopsy

  nounverb-transitiveC1
  /ˈɔːtɒpsi/A medical examination of a dead body to discover the cause of death.
• autoput

  nounC2
  /ˈɔːtəʊpʊt/A major road or highway, typically one for fast motor traffic, specifically a term for such roads in former Yugoslavia, Austria, and some other Central/Southeastern European countries.
• autoradiograph

  nounC2
  /ˌɔːtəʊˈreɪdɪəʊˌɡrɑːf/An image produced on photographic film or plate by the radiation emitted from a radioactive substance within an object, typically used to locate and analyze radioactive materials.
• autoradiography

  nounVery low
  /ˌɔːtəʊˌreɪdiˈɒɡrəfi/A technique that uses radioactive substances to create an image on photographic film or a radiation detector, typically used to visualize the location of radioactive material in a sample.
• autoregulation

  nounC1/C2
  /ˌɔː.təʊ.ˌrɛɡ.jʊˈleɪ.ʃən/The process by which a system, organ, or cell regulates itself without external control.
• autorickshaw

  nounC1
  /ˌɔː.təʊˈrɪk.ʃɔː/A small, three-wheeled motor vehicle with a hood, used as a taxi, particularly in South and Southeast Asia.
• autorotation

  nounLow
  /ˌɔː.təʊ.rəʊˈteɪ.ʃən/In aviation, the automatic rotation of helicopter or autogyro rotor blades, providing lift without engine power.
• autoroute

  nounLow in general English; high in contexts discussing French/Belgian/Canadian infrastructure.
  /ˈɔː.təʊ.ruːt/A motorway or limited-access highway, typically used in France and other French-speaking countries.
• autosave

  nounverb-intransitiveverb-transitiveC1
  /ˈɔːtəʊseɪv/A feature of software that automatically saves a user's work at regular intervals without requiring manual action.
• autoschediasm

  nounVery Low
  /ˌɔːtəʊˈskɛdɪæz(ə)m/The act of improvising or doing something without preparation; offhand improvisation.
• autosensitization

  nounC2 (Very Low Frequency)
  /ˌɔːtəʊˌsɛnsɪtaɪˈzeɪʃən/A process by which an organism develops an immune or allergic response to its own tissues or substances.
• autosexing

  nounLow
  /ˌɔːtəʊˈsɛksɪŋ/A method in poultry breeding and genetics where the sex of newly hatched chicks can be determined immediately by their plumage colour or pattern, without vent sexing.
• autosome

  nounC1/C2 (Technical, academic, medical, scientific)
  /ˈɔːtəˌsəʊm/Any chromosome that is not a sex chromosome; a chromosome not involved in sex determination.
• autospore

  nounVery Low
  /ˈɔː.təʊ.spɔː/A non-motile reproductive spore produced by some algae and fungi that develops into a new individual identical to its parent.

Showing 8361–8380 of 8734 words.