1. to force or allow (a fluid, especially blood) to escape from its normal vessel or container into surrounding tissue
Usage: medical/anatomical term; transitive or intransitive
2. to pour out or overflow (a liquid) from its usual bounds
Usage: rare; literary

Examples

• The IV needle caused blood to extravasate into the surrounding tissue, creating a bruise.
• When the vessel ruptures, fluid extravasates into the peritoneal cavity.
• The damaged capillaries allowed plasma to extravasate, leading to swelling.
• Extravasated blood beneath the skin appears as a hematoma.
• The chemotherapy drug extravasated from the vein during infusion.