Množina: grommets

ETYM French gourmette curb, curb chain, from gourmer to curb, thump, beat; cf. Armor. gromm a curb, gromma to curb.
1. A ring of plastic or metal, usually embedded in some material, through which rope or string may pass.
2. (Nautical) A ring formed by twisting on itself a single strand of an unlaid rope; also, a metallic eyelet in or for a sail or a mailbag.
In medicine, a tube inserted surgically into the eardrum in order to relieve glue ear in children.