English Words Starting With A

• ace in the hole

  nounC1
  /eɪs ɪn ðə həʊl/A hidden advantage or a secret resource kept in reserve until the right moment to ensure success.
• ace inhibitor

  nounC2
  /ˌeɪsiːˈiː ɪnˈhɪbɪtə/A pharmaceutical drug that blocks the action of the angiotensin-converting enzyme (ACE), used primarily to treat high blood pressure and heart failure.
• ace point

  nounLow (primarily technical sports jargon)
  /ˈeɪs ˌpɔɪnt/A point won directly from an ace (a service winner in tennis or similar games).
• acebutolol

  nounVery Low (Technical/Specialist)
  /ˌæsɪˈbjuːtəlɒl/A beta blocker medication used to treat hypertension and certain heart conditions.
• acedia

  nounC2
  /əˈsiːdɪə/A state of spiritual sloth, apathy, or listlessness, often considered a sin in traditional Christian contexts.
• aceh

  nounC2
  /ˈɑːtʃeɪ/A proper noun referring to the special region (province) of Aceh on the northern tip of Sumatra, Indonesia.
• acehnese

  adjectivenounLow
  /ˌɑːtʃəˈniːz/Relating to Aceh, its people, or their language.
• aceldama

  nounVery Low (Obscure)
  /əˈsɛldəmə/A place associated with bloodshed, slaughter, or violence, often with connotations of a cursed or desolate field.
• acellular vaccine

  nounC1/C2 (Low frequency, technical)
  /ˌeɪˈsɛljʊlə ˈvæksiːn/A vaccine that uses specific purified components of a pathogen, such as proteins or polysaccharides, rather than whole killed or weakened cells, to stimulate an immune response.
• acenesthesia

  nounExtremely rare/Very low
  /ˌeɪsiːnɪsˈθiːziə/A medical/psychological term for the loss or absence of the normal physical awareness of one's body or bodily sensations.
• acentric

  adjectivenounLow
  /eɪˈsɛntrɪk/Not central; lacking a centre; positioned away from the centre.
• acephate

  nounC1/C2
  /ˈeɪsɪfeɪt/A chemical compound used as a systemic organophosphate insecticide.
• acequia

  nounC2 (Proficient User, extremely rare in general English; specialized term)
  /əˈseɪkiə/a community-operated watercourse or irrigation ditch used in Spain, the southwestern United States, and Latin America, often for agricultural purposes.
• acerbate

  adjectiveverbverb-transitiveLow (C2)
  /ˈæs.ə.beɪt/to irritate, exasperate, or embitter; to make harsh, bitter, or sour
• acerbity

  nounC2
  /əˈsɜːbəti/A sharp, bitter, and harsh quality, typically in tone, manner, or expression.
• acerola

  nounLow frequency (Specialist/Botanical/Culinary)
  /ˌæs.əˈrəʊ.lə/A small, bright red, cherry-like tropical fruit (Malpighia emarginata) extremely rich in vitamin C.
• acervulus

  nounC2/Highly Specialized
  /əˈsɜːvjʊləs/A small, cushion-like mass of fungal tissue that produces asexual spores (conidia) on plant surfaces.
• acetabulum

  nounVery Low
  /ˌasɪˈtabjʊləm/The cup-shaped socket in the hip bone into which the head of the femur fits.
• acetal

  nounLow
  /ˈæsɪtæl/A colourless volatile liquid formed by the reaction of an aldehyde with two molecules of an alcohol.
• acetaldehyde

  nounC2
  /ˌasɪˈtaldɪhʌɪd/A colourless, flammable, volatile organic compound with the chemical formula CH3CHO, being the simplest aldehyde after formaldehyde.

Showing 681–700 of 8734 words.