A blood blister is a type of blister that forms when subdermal tissues and blood vessels are damaged without piercing the skin. It consists of a pool of lymph, blood and other body fluids trapped beneath the skin. If punctured, it suppurates a dark fluid. Sometimes the fluids are cut off from the rest of the body and dry up, leaving behind dead ce...
<dermatology> A collection of blood within a skin blister that results from minor skin trauma such as a pinch or crushing injury. ... (27 Sep 1997) ... 
Type: Term Definitions: 1. a blister containing blood; resulting from a pinch or crushing injury.
Blood blister: a blister full of blood due to a pinch, bruise or repeated friction. A blister is medically termed a vesicle. One that is more than 5 mm in diameter with thin walls and is full of watery fluid is called a bulla or a bleb. The word 'blister' entered English in the 14th century. It came from the Middle Dutch 'bluyster', blister and was...
Blood blister is Australian rhyming slang for sister.
[n] - blister containing blood or bloody serum usually caused by an injury
noun blister containing blood or bloody serum usually caused by an injury