amphibolic

adjective
am·​phi·​bol·​ic | \ ˌam(p)-fə-ˈbäl-ik How to pronounce amphibolic (audio) \

Medical Definition of amphibolic

: having an uncertain or irregular outcome used of stages in fevers or the critical period of disease when prognosis is uncertain the amphibolic period is popularly known as the crisis— G. F. Boddie