WordReference Random House Unabridged Dictionary of American English © 2025
ro•ta′tion-in•ver′sion ax′is
(rō tā′shən in vûr′zhən, -shən),USA pronunciation [Crystall.]
- Crystallographyan axis of a crystal such that rotating about the axis and then inverting the crystal brings the crystal back to its original position. Also called symmetry axis of rotary inversion. Cf. symmetry element.
'rotation-inversion axis' also found in these entries (note: many are not synonyms or translations):