English Words Starting With A

• acidulant

  nounC2
  /əˈsɪd.jʊ.lənt/A substance added to food or drink to increase acidity or sourness.
• acidulate

  verbverb-transitiveLow
  /əˈsɪdʒʊleɪt/To make something slightly acidic or sour in taste, flavour, or character.
• acidulent

  adjectivenounLow
  /əˈsɪdʒʊlənt/Having an acidic quality; slightly sour or sharp in taste.
• acierate

  verbverb-transitiveObsolete/Rare
  /ˈeɪ.si.ə.reɪt/To convert (iron) into steel; to steel.
• acinetobacter

  nounVery Low
  /ˌæsɪˌniːtəʊˈbæktə/A genus of Gram-negative bacteria commonly found in soil, water, and hospital environments, known for causing opportunistic infections.
• acinus

  nounLow (C2+ / Specialized)
  /ˈæs.ɪ.nəs/A small sac-like cavity or terminal division of a gland, especially in the pancreas or liver.
• acis

  nounVery Low (C2/Proficiency)
  /ˈeɪ.sɪs/In classical mythology, Acis is a Sicilian shepherd, beloved by the sea nymph Galatea.
• ack-ack

  nounC1
  /ˌæk ˈæk/Anti-aircraft artillery or gunfire; the sound made by such guns.
• ackee

  nounC2
  /ˈakiː/A tropical fruit native to West Africa, now also grown in the Caribbean, particularly Jamaica, where it is the national fruit.
• acker

  nounVery Low
  /ˈæk.ə/A British military slang term for a friend, mate, or comrade, originally used among soldiers.
• ackey

  nounExtremely rare / Obsolete
  /ˈæk.i/A historical silver coin, approximately sixpence in value, used in colonial West Africa (especially Ghana).
• acknowledge

  verbverb-transitiveB2
  /əkˈnɒl.ɪdʒ/to accept or admit the existence or truth of something; to recognize the fact or importance of something.
• acknowledgment

  nounC1
  /əkˈnɒl.ɪdʒ.mənt/The action of showing that you know or accept that something exists, is true, or has happened.
• acle

  nounExtremely rare, archaic/obsolete
  /ˈeɪ.kəl/An archaic word for a sore or ulcer, especially one on a horse.
• acleistocardia

  nounRare
  /əˌklaɪ.stəʊˈkɑː.di.ə/An abnormal condition of the heart where there is a congenital closure or failure of an opening.
• aclinic line

  nounVery Low (Technical/Specialist)
  /eɪˈklɪnɪk laɪn/A line on the Earth's surface connecting points where the magnetic dip (inclination) is zero; the magnetic equator.
• acme

  nounC1
  /ˈakmi/The point at which someone or something is best, perfect, or most successful.
• acme screw thread

  nounC2 (Very Low Frequency / Highly Specialized)
  /ˈæk.mi skruː θred/A specific, standardized type of trapezoidal screw thread profile with a 29° included angle, historically used for power transmission and lead screws in machine tools before being largely superseded by metric trapezoidal threads.
• acmeism

  nounVery Rare
  /ˈakmɪɪz(ə)m/A literary movement in early 20th-century Russian poetry that emphasized clarity, craft, and concrete imagery over symbolism.
• acmesthesia

  nounExtremely rare / technical
  /ˌakmɪsˈθiːzɪə/A sensation of a sharp point pressing against the skin.

Showing 841–860 of 8734 words.