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Pronunciation: ring


  1. A circular band surrounding a wide central opening; an anular or circular structure surrounding an opening or level area.
  2. The closed (endless) chain of atoms in a cyclic compound; commonly used for “cyclic” or “cycle.”
  3. A marginal growth on the upper surface of a broth culture of bacteria, adhering to the sides of the test tube in the form of a circle.

Synonym(s): anulusTA

[A.S. hring]

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.