DictionaryC-ax•isPronunciation: (sē'ak"sis), [key] —n., —pl. C-ax•esPronunciation: (sē'ak"sēz). [key] Crystall. the vertical crystallographic axis. Cf. A-axis, B-axis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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