The Collaborative International Dictionary
Clinodiagonal
Clinodiagonal \Cli`no*di*ag"o*nal\, n. [Gr. kli`nein to incline + E. diagonal.] (Crystallog.) That diagonal or lateral axis in a monoclinic crystal which makes an oblique angle with the vertical axis. See Crystallization. -- a. Pertaining to, or the direction of, the clinodiagonal.
Wiktionary
clinodiagonal
a. Pertaining to, or in the direction of, such a diagonal. n. (context crystallography English) That diagonal or lateral axis in a monoclinic crystal which makes an oblique angle with the vertical axis.