Meaning of adjoint

ad•joint

Pronunciation: (aj'oint), [key]
— n. Math.
  1. a square matrix obtained from a given square matrix and having the property that its product with the given matrix is equal to the determinant of the given matrix times the identity matrix.
  2. Also calledthe matrix obtained from a given matrix by interchanging rows and columns and by replacing each element by its complex conjugate.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.