- molybdenum, Mo, atomic number 42 - a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel
--1 is a kind of metallic element, metal
--1 is a substance of molybdenite - Missouri, Show Me State, MO - a midwestern state in central United States; a border state during the American Civil War, Missouri was admitted to the Confederacy without actually seceding from the Union
--2 is a kind of American state
--2 is a part of Midwest, Middle West
--2 is a member of
--2 has parts:Confederacy, Confederate States, Confederate States of America, South, Dixie, Dixieland