guard ring

noun

1. a ring worn tightly in front of another ring to prevent the latter from slipping off the finger.

guard ring

noun

1. Also calledguardkeeper ring jewellery an extra ring worn to prevent another from slipping off the finger
2. an electrode used to counteract distortion of the electric fields at the edges of other electrodes in a capacitor or electron lens

Word History and Origins

Origin of guard ring¹

First recorded in 1810–20

Example Sentences

It was borne on the third finger of the right hand, above the second joint, and was usually kept in place with a plain guard ring.

From Project Gutenberg