Search the Dictionary:

 
A-B-C-D-E-F-G-H-I-J-K-L-M-N-O-P-Q-R-S-T-U-V-W-X-Y-Z
 

isostasy :

The tendency of the earth’s crust to be in a state of balance, or equilibrium, caused by equal pressure from above and below. For example, high mountains pushing downward have deep roots of the same material holding up the great weight above.