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An early symptom indicating the onset of an attack or a disease.

[French, from Latin prodromus, precursor, from Greek prodromos, precursor : pro-, forward; see pro-2 + dromos, running.]

pro·dro′mal (-drō′məl), pro·drom′ic (-drŏm′ĭk) adj.
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Adj.1.prodromic - symptomatic of the onset of an attack or a disease
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References in periodicals archive ?
A total of 18 patients had significant prodromic signs.
HEV IgG and IgM antibodies were not detected in the blood donation, which indicates that the blood donation occurred during the prodromic phase of HEV disease.
Resolution of pain and tenderness was more rapid in patients taking the single-dose of famciclovir than in those taking a split dose, starting with 750 mg at the first prodromic sign and 750 mg later that day.