English dictionary



Hint: Asterisk (*) is a wildcard. Asterisk substitutes zero or more characters.

English noun: neptunium

1. neptunium (substance) a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium


Synonymsatomic number 93, Np


Broader (hypernym)metal, metallic element









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