Wordnet 3.0
NOUN (1)
1.
connection consisting of a metal ring on a rotating part of a machine;
provides a continuous electrical connection through brushes on stationary contacts;
The Collaborative International Dictionary of English v.0.48:
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]
WordNet (r) 3.0 (2006):
slip ring
n 1: connection consisting of a metal ring on a rotating part of
a machine; provides a continuous electrical connection
through brushes on stationary contacts