triad axis

triad axis

[′trī‚ad ‚ak·səs]
(crystallography)
A rotation axis whose multiplicity is equal to 3.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Just like in 2006, when America's maestro of preemptive war music, Younger Bush, was pointing his baton, through Condoleezza Rice, to the next candidate in his triad axis of evil: Iran.