Meaning of diadochy

di•ad•o•chy

Pronunciation: (dī-ad'u-kē), [key]
— n. Crystall.
  1. the ability of certain different elements to exist in place of each other in certain points of a space lattice; isomorphism.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.