Wiktionary
presymptomatic
a. (context medicine English) relating to the early stages of a disease, before all symptoms have developed and therefore accurate diagnosis is not possible
WordNet
presymptomatic
adj. of or relating to the early phases of a disease when accurate diagnosis is not possible because symptoms of the disease have not yet appeared [syn: preclinical]
Usage examples of "presymptomatic".
He found that a presymptomatic person with a genetic predisposition to a serious condition faces little or no difficulty in obtaining health insurance.