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Glossary of Dental Terms
beginning with letter A
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abutment
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noun
  1. (especially, of an object) The state of abutting.
activator
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noun
  1. (biology) Any chemical or agent which regulates one or more genes by increasing the rate of transcription.
  2. One who, or that which, activates.
antagonist
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noun
  1. An opponent or enemy.
  2. One who antagonizes or stirs.
  3. (biochemistry) A chemical that binds to a receptor but does not produce a physiological response, blocking the action of agonist chemicals.
    • 2001: The calcium antagonists represent one of the top ten classes of prescription drugs in terms of commercial value, with worldwide sales of nearly $10 billion in 1999. " Leslie Iversen, Drugs: A Very Short Introduction (Oxford 2001, p. 41)
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