fungoid adjective 1noun 1forms 3 adjective1 •Of, pertaining to, or resembling a fungus.He had no hair on the front of his head at all so that the sweep of bone skin, daunting in its fungoid pallor, came right over above his ears. — 1955 noun1 •A fungus, or some other organism closely resembling a fungus. formsfungoids · more fungoid · most fungoid