Rim

n. [A-S. rima, reoma, edge, lip; W. rhim, rhimp, a rim, edge, boundary, termination; Armor. rim.]

1. The border, edge, or margin of a thing; as, the rim of a kettle or basin; — usually applied to things which are circular or curving.
2. The lower part of the belly or abdomen. [Obs. or rare.] Browne.