• Complement: SFAF
    proteins in the blood that play a part in immune defense against invading organisms. Complement proteins, in conjunction with an antibody-antigen complex, initiate a sequence of events -- the complement cascade -- that results in the destruction of the membrane of the organism or cell under attack.
  • Complement JAMA
    A group of proteins in normal blood serum and plasma that, in combination with antibodies, cause the destruction of antigens, particularly bacteria and foreign blood corpuscles. See also Antibodies; Antigen.