blister copper

1. 1.

   an impure form of copper having a black blistered surface

   Broadercopper

Questions about blister copper

What does blister copper mean?

blister copper means "an impure form of copper having a black blistered surface".

Is blister copper a common word?

blister copper is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.