English Words Starting With A

• achromatopsia

  nounVery low (C2+)
  /əˌkrəʊ.məˈtɒp.si.ə/A medical condition characterised by the inability or severe deficiency in perceiving colour; complete colour blindness.
• achromobacter

  nounC1
  /ˌeɪkrəʊməʊˈbæktə/A genus of bacteria lacking pigment.
• achsah

  nounVery Low
  /ˈæksə/A proper noun, specifically a female given name of Hebrew origin, meaning "anklet" or "ornament."
• acicula

  nounLow / Very Rare
  /əˈsɪkjʊlə/A slender needle-like structure, such as a spine, bristle, or crystal.
• aciculum

  nounVery Low
  /əˈsɪkjʊləm/A slender, needle-like bristle or spine found in certain animals, especially in annelid worms and some insects.
• acid

  adjectivenounC1
  /ˈæs.ɪd/A chemical substance with a sour taste that reacts with metals and bases.
• acid anhydride

  nounLow
  /ˌæsɪd ænˈhaɪdraɪd/A chemical compound formed by removing water from two acid molecules, often reactive and used in synthesis.
• acid cell

  nounC2
  /ˈæs.ɪd sel/A small container or unit that generates electricity through a chemical reaction involving acidic electrolytes.
• acid drop

  nounLow
  /ˌæsɪd ˈdrɒp/A type of hard, sour boiled sweet (candy).
• acid dust

  nounLow to Medium
  /ˌæs.ɪd ˈdʌst/A fine, dry particulate matter suspended in the atmosphere that contains acidic components, primarily resulting from industrial emissions of sulphur dioxide and nitrogen oxides.
• acid dye

  nounC1-C2
  /ˌæsɪd ˈdaɪ/A type of dye that is applied to textiles (especially wool, silk, nylon) from an acidic bath.
• acid halide

  nounC2
  /ˌæsɪd ˈheɪlaɪd/An organic compound formed by replacing the hydroxyl group of a carboxylic acid with a halogen atom.
• acid house

  nounLow (cultural/historical term)
  /ˌæsɪd ˈhaʊs/A subgenre of house music that emerged in the mid-1980s in Chicago, characterised by the use of the 'squelching' basslines and hypnotic rhythms produced by the Roland TB-303 bass synthesiser.
• acid metaprotein

  nounExtremely Rare / Obsolete
  /ˈæsɪd ˌmɛtəˈprəʊtiːn/An obsolete, deprecated biochemical term for a class of proteins derived from other proteins through acid hydrolysis.
• acid number

  nounLow (C2)
  /ˌæs.ɪd ˈnʌm.bər/A chemical measure (usually expressed in milligrams of potassium hydroxide) of the amount of free acid present in a substance such as a fat, oil, or wax.
• acid precipitation

  nounC1
  /ˌæs.ɪd prɪˌsɪp.ɪˈteɪ.ʃən/Rain, snow, or any other form of moisture with a high concentration of acids, primarily sulphuric and nitric acid, caused by atmospheric pollution.
• acid radical

  nounVery Low
  /ˌæsɪd ˈrædɪkl̩/The part of an acid that remains after the acidic hydrogen atoms are removed; an atom or group of atoms that is the negative component of a salt.
• acid rain

  nounMedium (well-established in scientific and environmental discourse, less common in everyday conversation)
  /ˌæs.ɪd ˈreɪn/Rainfall made acidic by atmospheric pollution, especially sulfur and nitrogen oxides, that damages the environment.
• acid reflux

  nounMedium
  /ˌæs.ɪd ˈriː.flʌks/A medical condition where stomach acid flows back up into the oesophagus, causing discomfort.
• acid rock

  nounLow
  /ˌæs.ɪd ˈrɒk/A subgenre of rock music originating in the mid-1960s, characterized by long improvisations, heavy use of distortion, feedback, and electronic effects, intended to evoke or enhance psychedelic experiences.

Showing 801–820 of 8734 words.