hydrium
HydrogenHydrogen
Meaning
2 senses(rare, uncountable)Protium
(obsolete, uncountable)Hydrogen
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable
HydrogenHydrogen
(rare, uncountable)Protium
(obsolete, uncountable)Hydrogen