The American Heritage® Dictionary of the English Language, 4th Edition
n. The persistent conviction that one is or is likely to become ill, often involving symptoms when illness is neither present nor likely, and persisting despite reassurance and medical evidence to the contrary. Also called hypochondriasis.
n. A psychological disorder characterized by excessive preoccupation or worry about having a serious illness.
n. Plural form of hypochondrium.
the GNU version of the Collaborative International Dictionary of English
n. An excessive concern about one's own health, particularly a morbid worry about illnesses which a person imagines are affecting him, often focusing on specific symptoms; also called hypochondriasis.
The Century Dictionary and Cyclopedia
n. A morbid condition characterized by exaggerated uneasiness and anxiety as to one's health, and also by extreme general depression; low spirits: in this sense often abbreviated hypo, or formerly hyp, hip. See hypo. hip.
n. Plural of hypochondrium.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. chronic and abnormal anxiety about imaginary symptoms and ailments
Word Usage
"Another problem, O'Neill says, is that health anxiety – which used to be called hypochondria – is not taken seriously."