n. Swelling of the lower layers of the skin, often around the mouth, or of the mucosa or submucosa of the mouth or throat which can appear quickly in response to an allergen or due to other conditions
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. recurrent large circumscribed areas of subcutaneous edema; onset is sudden and it disappears within 24 hours; seen mainly in young women, often as an allergic reaction to food or drugs
Word Usage
"While hives develop on the skin's surface, angioedema is a swelling of the deeper layers of the skin."