'slip ring' definitions:

Definition of 'slip ring'

From: WordNet
noun
Connection consisting of a metal ring on a rotating part of a machine; provides a continuous electrical connection through brushes on stationary contacts

Definition of 'slip ring'

From: GCIDE
  • slip ring \slip ring\ n. a metal ring on a rotating part of a machine to provide a continuous electrical connection through brushes on stationary contacts [WordNet 1.5]