diacritical
oxford
views updated May 29 2018di·a·crit·i·cal / ˌdīəˈkritikəl/ •
adj. (of a mark or sign) serving to indicate different pronunciations of a letter above or below which it is written.DERIVATIVES: di·a·crit·i·cal·ly / -ik(ə)lē/ adv.
The Oxford Pocket Dictionary of Current English