1. a constituent element or part. 2. one part of a prosthesis system. clinical c's the three classification schemes that make up the omaha system: the problem classification scheme arranges 40 nursing diagnoses (called client problems) into four different domains; the intervention scheme assigns nursing interventions to the client problems; and the problem rating scale for outcomes assigns ratings to describe the client's problem-specific knowledge, behavior, and status at various points in the treatment process. See Appendix on the Omaha System. M component [Myeloma or Macroglobulinemia] structurally homogeneous protein in serum or urine appearing as a sharp spike in the beta or gamma globulin region on protein electrophoresis. The protein is in most cases a monoclonal immunoglobulin or heavy chain fragment, or a monoclonal immunoglobulin light chain or light chain fragment, either alone or with monoclonal immunoglobulin containing the same light chain. M components are characteristic of plasma cell dyscrasias. performance c's see performance components.