Annulation

//ˌænjʊˈleɪʃən// noun

Definitions

Noun
  1. 1
    The formation of a ring
  2. 2
    Any reaction that forms a ring of atoms
  3. 3
    Any structure in the form of a ring

Etymology

From Latin annulātus + -ation. Compare French annulation. Piecewise doublet of annullation.

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