D defs.my
Entry 1 sense Webster, 1913

Neogen

/(nē"ō̇*jĕn)/ · Ne·o·gen · IPA
01 n. An alloy resembling silver, and consisting chiefly of copper, zinc, and nickel, with small proportions of tin, aluminium, and bismuth.
  1. 1.
    An alloy resembling silver, and consisting chiefly of copper, zinc, and nickel, with small proportions of tin, aluminium, and bismuth.(Chem.)