The Collaborative International Dictionary of English v.0.48:

Phosphor-bronze \Phos"phor-bronze`\, n. [Phosphor + bronze.]
   (Metal.)
   A variety of bronze possessing great hardness, elasticity,
   and toughness, obtained by melting copper with tin phosphide.
   It contains one or two per cent of phosphorus and from five
   to fifteen per cent of tin.
   [1913 Webster]