English Words Starting With A

• acrotism

  nounExtremely Low (Specialist Medical Term)
  /ˈæk.rəˌtɪz.əm/The condition of having no perceptible pulse.
• acrux

  nounVery Low
  /ˈeɪ.krʌks/A proper noun; the brightest star in the southern constellation Crux (the Southern Cross).
• acrylaldehyde

  nounVery low (Technical/Low Frequency)
  /ˌæk.rɪlˈæl.dɪ.haɪd/A volatile, toxic, flammable liquid organic compound with a pungent, irritating odour, also known as acrolein (C3H4O).
• acrylamide

  nounC2
  /ˌakrɪlˈʌmʌɪd/A chemical compound that forms in starchy foods cooked at high temperatures, considered a potential health risk.
• acrylate

  nounRare / Technical
  /ˈækrɪleɪt/A salt, ester, or conjugate base of acrylic acid, often used in polymers and plastics.
• acrylic

  adjectivenounB2
  /əˈkrɪl.ɪk/A type of synthetic polymer or plastic material, often used in fibers, paints, and various manufactured products.
• acrylic acid

  nounC1/C2 (Very Low Frequency, Highly Specialised)
  /əˌkrɪl.ɪk ˈæs.ɪd/A pungent, corrosive, colourless organic acid (C₃H₄O₂) used primarily as a chemical intermediate in the production of polymers like acrylic plastics, resins, and superabsorbent materials.
• acrylic ester

  nounLow (Specialist)
  /əˈkrɪlɪk ˈɛstə/A chemical compound formed from acrylic acid and an alcohol, primarily used as a monomer for producing polymers and plastics.
• acrylic fiber

  nounB2
  /əˌkrɪl.ɪk ˈfaɪ.bər/A synthetic fiber made from polymers of acrylonitrile, known for being lightweight, warm, and resistant to wrinkles and moths.
• acrylic fibre

  nounB2-C1
  /əˌkrɪlɪk ˈfaɪbə/A synthetic fibre made from polymers derived from acrylic acid, used as a material in textiles.
• acrylic resin

  nounC1
  /əˌkrɪlɪk ˈrɛzɪn/A strong, transparent or translucent plastic made by polymerizing compounds derived from acrylic acid.
• acrylonitrile

  nounC2 (Proficient)
  /ˌakrɪlə(ʊ)ˈnʌɪtrʌɪl/A colorless, volatile liquid (chemical formula CH₂=CH-C≡N) used primarily as a monomer in the production of synthetic polymers like acrylic fibers and plastics.
• acrylyl

  adjectivenounC2
  /ˈækrɪlɪl/The univalent radical CH₂=CHCO−, derived from acrylic acid by removal of the hydroxyl group.
• acrylyl group

  nounVery low (Specialised technical)
  /ˈæk.rɪ.lɪl ˌɡruːp/The univalent radical derived from acrylic acid, having the formula CH2=CHC(O)-.
• act

  nounverbverb-intransitiveverb-transitiveA1
  /ækt/to do something; to behave in a particular way; to perform a role in a play or film.
• act call

  nounLow
  /ˈækt ˌkɔːl/A theatrical term for the moment when an actor is summoned to the stage or set to perform.
• act curtain

  nounC1-C2 / Low Frequency
  /ˈækt ˌkɜː.tən/A theatrical curtain that separates the stage from the audience, used at the beginning and end of acts.
• act of contrition

  nounC2
  /ˌækt əv kənˈtrɪʃ.ən/A formal prayer expressing sorrow for one's sins, often associated with the Catholic sacrament of confession.
• act of faith

  nounC1
  /ˌækt əv ˈfeɪθ/An action performed without certainty of success or safety, based on trust, belief, or religious conviction.
• act of god

  nounC1-C2
  /ˌækt əv ˈɡɒd/A natural event or disaster that is sudden, catastrophic, and caused by natural forces beyond human control, such as a hurricane, flood, earthquake, or lightning strike.

Showing 981–1000 of 8734 words.