split-ring piston packing

split-ring piston packing

[′split ¦riŋ ′pis·tən ‚pak·iŋ]
(mechanical engineering)
A metal ring mounted on a piston to prevent leakage along the cylinder wall.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.