acanthosis nigricans acanthosis nigricans /əˌkænθoʊsɪs nɪˈɡrɪkənz/

noun

1. A skin disease characterized by dark wartlike patches in the body folds; can be benign or malignant  ( acanthosis nigricans , keratosis nigricans )
   a skin disease characterized by dark wartlike patches in the body folds; can be benign or malignant