Definition of Hippus
1. a clonic spasm of the iris [n -ES]
Medical Definition of Hippus
1. Intermittent pupillary dilation and constriction, independent of illumination, convergence, or psychic stimuli. Origin: G. Hippos, horse, from a fancied suggestion of galloping movements Respiratory hippus, dilation of the pupils occurring during forced, voluntary inspiration, and contraction during expiration. (05 Mar 2000)
Click the following link to bring up a new window with an automated collection of images related to the term: Hippus Images
Lexicographical Neighbors of Hippus
Literary usage of Hippus
Below you will find example usage of this term as found in modern and/or classical literature:
1. The American Journal of the Medical Sciences by Southern Society for Clinical Investigation (U.S.) (1908)
"74) come to the following conclusions upon this subject: (1) The term pathological hippus is used to designate variations in the diameter of the pupil which ..."
2. Text-book of Ophthalmology by Ernst Fuchs (1911)
"... the name of hippus is designated a pathological condition which consists , constant and rapid change in t lie diameter of the pupil. ..."
3. An Easy Outline of Evolution by Dennis Hird (1903)
"EOCENE (G. eos, dawn, kainos, new): In geology, the earliest period of the tertiary age. EOhippus : See hippus. EPIDERMIS (G. epi, upon, derma, ..."
4. Eye, Ear, Nose and Throat: A Manual for Students and Practitioners by Howard Charles Ballenger, Adolphus George Wippern (1917)
"... and hippus. Mydriasis.—Mydriasis, or dilatation of the pupil, may be spasmodic or paralytic. When spasmodic, it may be a symptom of cerebral or spinal ..."
5. Journal of Nervous and Mental Disease by Philadelphia Neurological Society, American Neurological Association, Chicago Neurological Society, New York Neurological Association (1893)
"In chorea there was no hippus. Neurasthenic patients showed it occasionally." It is true that hippus is very common in disseminated sclerosis; ..."
6. A History of the Jewish People in the Time of Jesus Christ by Emil Schürer (1896)
"At the outbreak of the Jewish revolt the district of hippus as well as that of ... The statements of Josephus are here indeed very systematic, hippus SO, ..."