<geometry> Joining two not adjacent angles of a quadrilateral or multilateral figure; running across from corner to corner; crossing at an angle with one of the sides. Diagonal bond Same as Cross bedding, under Cross.

Origin: L. Diagonalis, fr. Gr. From to angle; through + an angle; perh. Akin to E. Knee: cf. F. Diagonal.

(01 Mar 1998)