| a contagious tropical disease especially of children caused by a spirochete (Treponema pertenue) closely resembling the causative agent of syphilis and marked by infectious ulcerative skin lesions with later bone involvement |
| a tropical contagious skin disease especially of children caused by a bacterium that is a spirochete |
| an infectious contagious tropical disease especially of children that is caused by a spirochete of the genus Treponema (T. pertenue) and that is characterized by a primary ulcerating lesion on the skin followed by a secondary stage in which ulcers develop all over the body and by a third stage in which the bones are involved |
