English dictionary



Hint: In most browsers you can lookup any word by double click it.

English noun: atomic number 21

1. atomic number 21 (substance) a white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite


SynonymsSc, scandium


Broader (hypernym)metal, metallic element


Substance meronymthortveitite









Based on WordNet 3.0 copyright © Princeton University.
Web design: Orcapia v/Per Bang. English edition: .
2025 onlineordbog.dk