MSH: A heavy metal trace element with the atomic symbol Cu, atomic number 29, and atomic weight 63.55.,CSP: reddish, malleable metal; atomic number, 29; atomic weight, 63.54; symbol Cu; with poisonous salts; copper is essential in nutrition, being a component of various proteins, including ceruloplasmin, erythrocuprein, cytochrome c oxidase, and tyrosinase; deficiency, which is rare, may result in hypochromic microcytic anemia, neutropenia, and bone changes; excessive accumulation in the body may lead to copper poisoning.,NCI: An element with atomic symbol Cu, atomic number 29, and atomic weight 63.