English dictionary



Hint: Wildcards can be used multiple times in a query.

English noun: hydrogen atom

1. hydrogen atom (substance) an atom of hydrogen


Broader (hypernym)atom


Narrower (hyponym)acid hydrogen, acidic hydrogen, deuterium, heavy hydrogen


Part holonymhydrogen ion









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