|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a gadget; dingus; thingumbob.|
complement com·ple·ment (kŏm'plə-mənt)
A group of proteins found in normal blood serum and plasma that are activated sequentially in a cascadelike mechanism that allows them to combine with antibodies and destroy pathogenic bacteria and other foreign cells.
|complement (kŏm'plə-mənt) Pronunciation Key