1. An abnormally high fever, typically above 106°F (41°C), often considered a medical emergency.
Usage: Medical/clinical term; Also called malignant hyperthermia in certain contexts

Examples

• The patient developed hyperpyrexia after the surgery, requiring immediate cooling measures.
• Hyperpyrexia can cause seizures and organ damage if not treated promptly.
• The child's hyperpyrexia was brought down with ice baths and antipyretic medication.
• Certain infections can trigger hyperpyrexia in susceptible individuals.
• The emergency room team recognized the signs of hyperpyrexia and acted quickly.