component of complement

com·po·nent of com·ple·ment (C),

any one of the nine distinct protein units designated C1 through C9. See: complement.
See also: complement pathways.

com·po·nent of com·ple·ment

(C) (kŏm-pō'nĕnt kom'plĕ-mĕnt) Any one of the nine distinct protein units (designated C1-C9) that effect the immunologic activities associated with complement.