fissura
noun [ C ] medical specialized uk/fɪˈsjʊə.rə/ us/fɪˈsʊr.ə/ fissurae /fɪˈsjʊə.ri/ /fɪˈsʊr.i/
(拉丁语）裂，裂隙（用于与大脑表面或脊髓有关的医学术语中)
a Latin word meaning "fissure" (= a long, deep, narrow space in a surface), used in medical names and descriptions of the surface of the brain or spinal cord