i Register
In some senses, hc is marked as slang. Watch for register when choosing this word.
noun
Initialism of hydrocarbonate.
Initialism of hydrocarbon, a class of molecules containing hydrogen and carbon atoms.
Initialism of hockey club.
Initialism of headcanon.
Abbreviation of hardcore.
verb
Initialism of headcanon.
noun
Alternative letter-case form of HC (“headcanon”).