platinum black

1. 1.

   a fine black powder of platinum; used as a catalyst in chemical reactions

   Broadercatalyst

Questions about platinum black

What does platinum black mean?

platinum black means "a fine black powder of platinum; used as a catalyst in chemical reactions".

Is platinum black a common word?

platinum black 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.