Main Entry: com·ple·ment

Pronunciation: \ˈkäm-plə-mənt\

Function: noun

1 : a group or set (as of chromosomes or DNA) that is typical of the complete organism or one of its parts—see chromosome complement
2 : a complementary color
3 : the thermolabile group of proteins in normal blood serum and plasma that in combination with antibodies causes the destruction especially of particulate antigens (as bacteria and foreign blood corpuscles)