Having ten sides.
1. Derived from, or having the character of, rheum; rheumic. [Obs.] 2. (Med.) Of or pertaining to rheumatism; as, rheumatic pains or affections; affected with rheumatism; as, a rheumatic old man; causing rheumatism; as, a rheumatic day. That rheumatic diseases do abound. Shak. One affected with rheumatism.