Definition of "depressant"

depressant

/dɪˈpɹɛsənt/

noun
countable and uncountable, plural depressants
1. (pharmacology) A pharmacological substance which decreases neuronal or physiological activity.
2. (mining) An agent that inhibits the flotation of a mineral or minerals.
adjective
comparative more depressant, superlative most depressant
1. (pharmacology) reducing functional or nervous activity.