a number associated with an element in a square matrix, equal to the determinant of the matrix formed by removing the row and column in which the element appears from the given determinant
minor
2. biochemistry
a nonprotein substance that forms a complex with certain enzymes and is essential for their activity. It may be a metal ion or a coenzyme
cofactor in American English
(ˈkoʊˌfæktər)
noun
1.
any one of two or more factors, the combined effects of which may cause a certain result or condition, esp. a disease
: also written co-factor
2. Biochemistry
an accessory substance, esp. a coenzyme, that must be present for a particular biological reaction to occur