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An 1832 article that attempts to define "reaction", philologically, mathematically (or physically), and morally.[1]

In science, reaction (TR:625) (LH:28) (TL:653|#48), from Latin reagere “react”, from re- “back” + agree “to do, act”, is one action equal and opposed to another action, with respect to the mutual actions of two bodies upon each other, being equal and directed to contrary parts, according to the third law of motion (Newton, 1687); a process in which there is a change in bonds, wherein reactants transform into products (Cullen, 1757).[2]


The following are related quotes:

“To every ‘action’ there is always opposed an equal ‘reaction’: or the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.”
— Isaac Newton (1687), Principia [3]

End matter

See also


  1. Anon. (1832). “Re-Action” (pg. 201), The Bristol Job Nott: Laboring Man’s Friend, 51:201-02, Nov 29.
  2. Reaction – Online Etymology Dictionary.
  3. Laws of motion – Hmolpedia 2020.

External links

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