The American Heritage® Dictionary of the English Language, 4th Edition
n. A burning sensation, usually centered in the middle of the chest near the sternum, caused by the reflux of acidic stomach fluids that enter the lower end of the esophagus. Also called acid reflux, cardialgia, pyrosis.
n. A burning pain in the chest that is caused by stomach acid entering the gullet.
the GNU version of the Collaborative International Dictionary of English
n. An uneasy, burning sensation in the stomach, often attended with an inclination to vomit. It is sometimes idiopathic, but is often a symptom of other complaints.
The Century Dictionary and Cyclopedia
n. An uneasy burning sensation rising into the esophagus from the stomach, due to acidity and regurgitation; cardialgia.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a painful burning sensation in the chest caused by gastroesophageal reflux (backflow from the stomach irritating the esophagus); symptomatic of an ulcer or a diaphragmatic hernia or other disorder
Word Usage
"Or in Tabitha’s case, maybe the term heartburn was more appropriate."