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Primary


 
  • Ordinal adjectives:
  • Primary "first", first hand.
  • Secondary "second", second hand.
  • Tertiary "third", third hand.
  • In organic chemistry:
  • Primary : functional group attached to carbon atom connected to 1 or no other Carbon atoms
  • Secondary: functional group attached to carbon atom connected to 2 other Carbon atoms
  • Tertiary: functional group attached to carbon atom connected to 3 other Carbon atoms
  • Quaternary: functional group (or usually ion) attached to carbon atom connected to 4 other Carbon atoms
  • In physics, the term primary can refer to the most massive component of a gravitationally bound system: see satellite.
  • In electrical or electronics engineering, primary refers the driven winding of a transformer
  • In politics, primary is short for primary election.
  • The movie Primary.
 
 

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