cofactor
noun(co-fac-tor)
the signed minor of an element of a square matrix or of a determinant with the sign positive if the sum of the column number and row number of the element is even and with the sign negative if it is odd
cofactor
noun(co-fac-tor)
a substance that acts with another substance to bring about certain effects; especially : coenzyme
cofactor
noun(co-fac-tor)
something (such as diet or a virus) that acts with or aids another factor in causing disease