hematoma

noun, plural he·ma·to·mas, he·ma·to·ma·ta [hee-ma-toh-muh-tuh, hem-uh-] /ˌhi mæˈtoʊ mə tə, ˌhɛm ə-/. Pathology.

1. a circumscribed collection of blood, usually clotted, in a tissue or organ, caused by a break in a blood vessel.

n. pl. he•ma•to•mas

1. A localized swelling filled with blood resulting from a break in a blood vessel.

Plural hematomas hematomata (hē′mə-tō′mə-tə)

1. The abnormal buildup of blood in an organ or other tissue of the body, caused by a break in a blood vessel.