Definitions for "Isostatic"
Subjected to equal pressure from every side; being in hydrostatic equilibrium, as a body submerged in a liquid at rest; pertaining to, or characterized by, isostasy.
isostasy is the theoretical equilibrium that tends to exist in the Earth's crust, in which any disturbance, such as erosion, sedimentation, change in size of ice sheets, is compensated for by an opposite movement in the Earth's crust.
from isostasy, the state of balance, or equilibrium, which sections of the earth's lithosphere (whether continental or oceanic) are thought ultimately to achieve when the vertical forces upon them remain unchanged. The lithosphere floats upon the semifluid asthenosphere below. If a section of lithosphere is loaded, as by ice, it will slowly subside to a new equilibrium position; if a section of lithosphere is reduced in mass, as by erosion, it will slowly rise to a new equilibrium position
Keywords:  sea, rise, fall, land, relation
the rise and fall of the land in relation to the sea