English dictionary



Hint: Question mark (?) is a wildcard. Question mark substitutes one character.

English noun: platinum black

1. platinum black (substance) a fine black powder of platinum; used as a catalyst in chemical reactions


Broader (hypernym)accelerator, catalyst









Based on WordNet 3.0 copyright © Princeton University.
Web design: Orcapia v/Per Bang. English edition: .
2026 onlineordbog.dk