English Words Starting With A

• azide

  nounLow
  /ˈeɪzaɪd/A chemical compound containing the group N₃⁻, typically a salt or ester of hydrazoic acid.
• azido group

  nounC2 (Technical)
  /ˈazɪdəʊ ɡruːp/A functional group in organic chemistry consisting of three nitrogen atoms linked together (N₃), often replacing a hydrogen atom in a molecule.
• azidothymidine

  nounVery low (technical term)
  /ˌæzɪdəʊˈθaɪmɪdiːn/A synthetic nucleoside analog that inhibits viral replication by blocking reverse transcriptase.
• azikiwe

  nounVery Low
  /ˌæzɪˈkiːweɪ/A proper noun referring to a surname of Nigerian origin, most famously associated with Nnamdi Azikiwe, the first President of Nigeria.
• azilian

  adjectivenounVery Low
  /əˈzɪlɪən/Relating to a Mesolithic culture of southwestern Europe, characterized by painted pebbles and microlithic tools.
• azimuth

  nounC1+
  /ˈazɪməθ/The horizontal angular distance from a reference direction (usually true north) to a point, measured clockwise in degrees.
• azimuth bar

  nounRare / Technical
  /ˈæzɪməθ bɑː/A physical bar or graduated scale on an instrument (especially a compass or navigational device) used to measure the horizontal angular distance, or azimuth, of a celestial body or landmark relative to the observer's heading.
• azimuth circle

  nounC2
  /ˈazɪməθ ˌsɜːk(ə)l/A graduated, circular instrument (or a part of another instrument like a theodolite) used for measuring azimuths—the horizontal angle or direction of a celestial body or object relative to true north.
• azimuthal equidistant projection

  nounC2
  /ˌæzɪˈmjuːθəl ˌiːkwɪˈdɪstənt prəˈdʒɛkʃən/A map projection that preserves accurate distances and directions from a single central point to all other points.
• azimuthal projection

  nounLow (C2)
  /ˌazɪˈmjuːθl prəˈdʒɛkʃ(ə)n/A map projection where the surface of a sphere is projected onto a plane from a single point (perspective point), such that all points on the map are at correct directions (azimuths) from the central point.
• azimuthal quantum number

  nounLow
  /ˌazɪˈmjuːθ(ə)l ˈkwɒntəm ˌnʌmbə/The quantum number (ℓ) that describes the shape of an electron's orbital around an atomic nucleus.
• azine

  nounVery Rare / Specialist
  /ˈeɪziːn/A type of chemical compound characterized by a six-membered ring containing nitrogen atoms. In particular, it refers to heterocyclic compounds with one or more nitrogen atoms in the ring.
• azine dye

  nounC2
  /ˈeɪ.ziːn ˌdaɪ/A synthetic organic dye whose chemical structure contains a six-membered ring of alternating carbon and nitrogen atoms (azine ring).
• azlon

  nounRare
  /ˈæzlɒn/A manufactured fiber derived from natural protein sources.
• aznar

  nounVery Low
  /æzˈnɑː/Proper noun; Spanish surname of Basque origin.
• azo dye

  nounC1
  /ˈæzəʊ ˌdaɪ/A type of synthetic dye containing a nitrogen-based azo group (-N=N-) linking aromatic rings; used to colour textiles, leather, paper, and foods.
• azo group

  nounC1
  /ˈeɪzəʊ ˌɡruːp/A functional group in organic chemistry with the structure R-N=N-R', where two nitrogen atoms are double-bonded to each other.
• azobenzene

  nounVery Low
  /ˌeɪzəʊˈbɛnziːn/A chemical compound consisting of two benzene rings linked by an azo group (-N=N-), typically a yellow or orange crystalline solid.
• azoic dye

  nounC2
  /eɪˈzəʊ.ɪk daɪ/A synthetic dye whose molecular structure contains the azo group (–N=N–) linking aromatic rings.
• azoimide

  nounRare
  /ˌazəʊˈʌɪmʌɪd/A chemical compound, specifically hydrazoic acid (HN₃) or its salts (azides).

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