* * *
pro·dro·mal (')prō-'drō-məl also pro·dro·mic -mik adj PRECURSORY esp of, relating to, or marked by prodromes <the \prodromal stages of a disease>
* * *
adj.
relating to the period of time between the appearance of the first symptoms of an infectious disease and the development of a rash or fever. A prodromal rash is one preceding the full rash of an infectious disease.
Medical dictionary. 2011.