Definitions

1. adjective

occurring or appearing before the main onset of a disease, typically as a warning sign or symptom.

“The patient’s prodromal symptoms included a mild fever and fatigue before the full-blown illness set in.”

2. noun

a symptom or sign that occurs before the onset of a disease.

“The prodromal phase of the disease is often characterized by headaches and nausea.”

3. noun

the period before the onset of a disease, during which prodromal symptoms occur.

“The doctor studied the patient’s prodromal period to better understand the progression of the disease.”