hard lead

Noun
  1. A lead alloy that contains about 5% antimony (synset 114929348)
    is a type of: atomic number 82, lead, pb - a soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull grey
    subtypes: grid metal - a kind of hard lead that is used for grids in storage batteries
    same as: antimonial lead
  2. Unrefined lead that is hard because of the impurities it contains (synset 114929227)
    is a type of: atomic number 82, lead, pb - a soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull grey

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