n. An ophthalmologic condition where one perceives two images; double vision.
the GNU version of the Collaborative International Dictionary of English
n. The act or state of seeing double.
The Century Dictionary and Cyclopedia
n. In pathology, the morbid condition of vision in which a single object appears double. Also diplopy.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. visual impairment in which an object is seen as two objects
Word Usage
"Eighty-three percent of the parents of these children reported benefits, ranging from improved immune defenses, regression of diplopia, or improved blood values."