Main Entry: nucleus grac·i·lis Pronunciation: -'gras-&-l&s Function: noun : a nucleus in the posterior part of the medulla oblongata inwhich the fibers of the fasciculus gracilis terminate
nucleus gracilis nucleus grac·i·lis (grās'ə-lĭs) n. The medial of the three nuclei of the dorsal spinal column, receiving dorsal root fibers conveying sensory innervation of the leg.