What is the meaning of Irritant?

Causing irritation or inflammation.

Rendering null and void; conditionally invalidating.

Any medication designed to cause irritation

A source of irritation.

irritating, annoying

gerund of irritar

annoying, causing irritation or annoyance; vexatious

present participle of irriter

irritating; annoying

irritant

third-person plural present active indicative of irrītō

Source: wiktionary.org