Definitions:

1. A medical term that refers to a collection of blood within a body cavity or space, typically caused by trauma, injury, or a ruptured blood vessel. NOUN
   • Surgical drainage was required to manage the pelvic haematocele following a ruptured ectopic pregnancy.
2. Swelling caused by blood collecting in a body cavity. NOUN
   • The haematocele was treated with antibiotics and anti-inflammatory medication.

Synonyms:

• blood cyst
• hematocele
• hematoma
• hemorrhagic swelling