HEMISYSTOLE
Hem`i*sys"to*le, n. (Physiol.)
Definition: Contraction of only one ventricle of the heart.
Note: Hemisystole is noticed in rare cases of insufficiency of the mitral valve, in which both ventricles at times contract simultaneously, as in a normal heart, this condition alternating with contraction of the right ventricle alone; hence, intermittent hemisystole.
Source: Webster’s Unabridged Dictionary 1913 Edition
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ONCHOCERCIASIS
(noun) infestation with slender threadlike roundworms (filaria) deposited under the skin by the bite of black fleas; when the eyes are involved it can result in blindness; common in Africa and tropical America
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