Pronunciation: (di-lāt'nt, dī-), [key]
1. dilating; expanding.
2. Physical Chem.exhibiting an increase in volume on being changed in shape, owing to a wider spacing between particles.
3. Petrol.(of rock) exhibiting an increase in volume owing to rearrangement and recrystallization of constituent grains.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.