(soil science) The downward movement of clay in a soil profile

Alternative form of Imma

To make a rustling sound while moving. / (transitive) To flourish with a swishing sound. / (transitive, slang, dated) To flog; to lash.

Any treatment of an ore used to concentrate its valuable constituents (minerals) into products (concentrate) of smaller bulk, and simultaneously to collect the worthless material (gangue) into disc...