[yaws] n pl but sing or pl in constr [prob. fr. an English-based creole of the Caribbean] (1679): an infectious contagious tropical disease caused by a spirochete (Treponema pertenue) closely resembling the causative agent of syphilis and marked by ulcerating lesions with later bone involvement--called also frambesia
YAWS
Meaning of YAWS in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012