In
chemistry or
mining,
polymetal or
polymetallic is a substance composed of a combination of different
metals. When the substance contains only two metals the term
bimetal (
bimetallic) is sometimes preferred. A
polymetallic ore (or
polymetal ore) is an
ore that is the source of more than one metal suitable for recovery. A
mine containing polymetallic ore is a
polymetallic mine.
Polymetallic nodules are
concretions of
manganese and
iron (and other metals) found on the ocean floor. They are sometimes called
manganese nodules, after their principal component.