what does acid hydrogen mean?

ACID HYDROGEN as NOUN

Meaning
- a hydrogen atom in an acid that forms a positive ion when the acid dissociates
Synonym(s)
- acidic hydrogen (what does acidic hydrogen mean?)
Hypernyms(s) acid hydrogen is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
- hydrogen atom (what does hydrogen atom mean?)