Cajal: Santiago Ramón y Cajal, Spanish histologist, physician, pathologist Fortún Garcés Cajal, medieval Spanish nobleman Nicolae Cajal (1919–2004), Romanian Jewish physician, academic, politician, philanthropist Cajal Institute, a neuroscience research center in Madrid, Spain. Cajal cells Cajal–Retzius cell Interstitial cell of Cajal (ICC) Cajal bodies (CBs) Cajal (crater), a tiny lunar impact crater