noun.
A localized swelling filled with blood resulting from a break in a blood vessel.
The Century Dictionary and Cyclopedia
noun.
In pathology, a swelling filled with extravasated blood. Also hematome, hæmatome.
the GNU version of the Collaborative International Dictionary of English
noun.
A localised leakage of blood from the blood vessels into nearby tissues, usually confined within a tissue or organ; especially, a local swelling produced by an effusion of blood beneath the skin, which may clot and discolor the affected area.
noun.
A swelling of blood, usually clotted, which forms as a result of a broken blood vessel.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a localized swelling filled with blood
Word Usage
"Vitamin E and surgery do not mix because Vitamin E is associated with increased bleeding, and this can lead to collection of blood called a hematoma that could result in serious complications."