Added 9 October 2026 agaricus noun Categories: PlantsRare Words noun ! Definition from WordNet 3.1, Princeton University. More about agaricus at Wordnik → Where our words come from → Type genus of Agaricaceae; gill fungi having brown spores and including several edible species. Related Words: inocybepsilocybeagaricaceaeamanitaboletuslactariuslaetiporusagaricalesaspergillus Back to today's word