Found 2 items, similar to Piston ring.
English → English (WordNet)
Definition: piston ring
piston ring
n : seal consisting of a split metal ring that seals the gap
between a piston and the cylinder wall
English → English (gcide)
Definition: Piston ring
Piston ring
\Pis"ton ring\ (Mach.)
A spring packing ring, or any of several such rings, for a
piston.
[Webster 1913 Suppl.]