Pronunciation: (ī"su-dī"u-me'trik), [key]
1. having equal diameters or axes.
2. having the diameter similar throughout, as a cell.
3. (of crystals) having two, or three, equal horizontal axes and a third, or fourth, unequal axis at right angles thereto.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.