(inorganic chemistry) Group seven of the periodic table, comprising manganese, technetium, rhenium and bohrium.

The black oxide of manganese, MnO₂.

rhodochrosite

Cast steel containing a considerable percentage (10-14%) of manganese, which makes it very hard and tough and highly resistant to wear.

plural of manganese nodule

plural of manganese steel

(inorganic chemistry) The chemical compound MnO₂; a brown or black solid used as a component of dry cell batteries.

(organic chemistry, automotive) (CH₃C₅H₄)Mn(CO)₃ ; an octane number boosting additive to unleaded gasoline to replace tetra-ethyl lead as an anti-knock component