Grom"met (?), n. [F. gourmette curb, curb chain, fr. gourmer to curb, thump, beat; cf. Armor. gromm a curb, gromma to curb.]
1.
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. Sometimes written grummet.
2. Mil.
A ring of rope used as a wad to hold a cannon ball in place.
© Webster 1913.