[liontutuxx]

Buddhists do use the term adhamma, though.

How do we know? Because our mind was indoctrinated about it on DW?

In the Pali, the definitions of dhamma and adhamma are clear.

Dhammo have rakkhati dhammacāriṃ
dhammo suciṇṇo sukhamāvahati;
Esānisaṃso dhamme suciṇṇe,
na duggatiṃ gacchati dhammacārī.

Nahi dhammo adhammo ca, ubho samavipākino;
Adhammo nirayaṃ neti, dhammo pāpeti suggatiṃ.

The Dhamma protects those who live by the Dhamma.
The Dhamma well-practiced brings happiness.
This is the reward when Dhamma is well-practiced:
One who lives by the Dhamma does not go to a bad destination.

For Dhamma and non-Dhamma do not bear equal fruit
Dhamma leads to a good destination; Non-Dhamma leads to hell.

Dhammika