noun
: a hypothetical more or less complete resumption by the earth of spheroidal form after distortion (as is sometimes held to follow periods of collapse to tetrahedral shape)
noun
: a hypothetical more or less complete resumption by the earth of spheroidal form after distortion (as is sometimes held to follow periods of collapse to tetrahedral shape)
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012