Cajal

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