rotation axis: Meaning and Definition of

rota'tion ax"is

Pronunciation: [key]
— Crystall. Crystall.
  1. an imaginary line through a crystal about which the crystal may be rotated a specified number of degrees and be brought back to its original position. Also calledCf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.