(veterinary medicine, equestrianism) A bony deposit on the leg of a horse, forming a ring around the bone.

An underwater vortex ring with an air bubble occupying the core of the vortex.

A ring of stones, etc., used to prevent a campfire from spreading.

Synonym of piscatory ring

A ring for fastening a scythe blade to the snath.

(textiles) A machine for spinning, in which the twist, given to the yarn by a revolving bobbin, is regulated by the drag of a small metal loop which slides around a ring encircling the bobbin, instead of by a throstle.

A lady's ring, worn on the hand, comprising a band of precious metal (usually gold) set with a continuous line of identically cut gemstones (usually diamonds) to symbolize never-ending love, usually given by a husband to his wife on a significant anniversary.

(especially (Britain)) a spanner with a ring-shaped jaw with internal serrations which grip onto a nut or bolt.

The ring on a cannon next behind the muzzle ring.

(medicine, biology) A dark ring around the outside of the iris.