You searched for: “trichoglossia”
trichoglossia (s) (noun), trichoglossias (pl)
A hairy condition of the tongue which is a benign side effect of some antibiotics: One symptom of trichoglossia is a dark overgrowth of the papillae of the tongue.

A trichoglossia is a lengthening of the filiform papillae, producing an appearance as if the tongue were covered with hair.