Medical Dictionary


noun fis·sure \ˈfish-ər, British also ˈfish-yr\

Medical Definition of FISSURE

:  a natural cleft between body parts or in the substance of an organ: as a :  any of several clefts separating the lobes of the liver b :  any of various clefts between bones or parts of bones in the skull c :  any of the deep clefts of the brain; especially :  one of those located at points of elevation in the walls of the ventricles—compare sulcus d :  anterior median fissure; also :  posterior median septum
:  a break or slit in tissue usually at the junction of skin and mucous membrane <fissure of the lip>
:  a linear developmental imperfection in the enamel of a tooth
fis·sured \ˈfish-ərd, British also ˈfish-yrd\ adjective
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