guard ring
noun
a ring worn tightly in front of another ring to prevent the latter from slipping off the finger.
Origin of guard ring
First recorded in 1810–20
Words nearby guard ring
guard dog,
guard duty,
guard hair,
guard of honor,
guard pin,
guard ring,
guard's van,
guardafui,
guardant,
guarded,
guardee
British Dictionary definitions for guard ring
guard ring
noun
Also called: guard, keeper ring jewellery
an extra ring worn to prevent another from slipping off the finger
an electrode used to counteract distortion of the electric fields at the edges of other electrodes in a capacitor or electron lens