Pronunciation: (grom'it),[key] —n. 1. Mach. a. any of various rings or eyelets of metal or the like.
b. an insulated washer of rubber or plastic, inserted in a hole in a metal part to prevent grounding of a wire passing through the hole.
2. Naut. a. a ring or strop of fiber or wire; becket.
b. a ring having a thickness of three strands, made by forming a loop of a single strand, then laying the ends around the loop.
c. a ring of fiber used as a seal or gasket, as under the head of a bolt.
3. a washer or packing for sealing joints between sections of pipe.
4. Mil.a stiff ring of rubber or metal inside the top of a service cap, designed to keep the top of the cap stretched flat.
5. a metal-bound eyelet in cloth, sometimes used decoratively, as on a garment.