diacritical

adjective
di·​a·​crit·​i·​cal | \ ˌdī-ə-ˈkri-ti-kəl How to pronounce diacritical (audio) \
variants: or less commonly diacritic \ ˌdī-​ə-​ˈkri-​tik How to pronounce diacritic (audio) \

Definition of diacritical

1 : serving as a diacritic
2a : distinctive the diacritical elements in culture— S. F. Nadel
b : capable of distinguishing students of superior diacritical powers

First Known Use of diacritical

1749, in the meaning defined at sense 1

History and Etymology for diacritical

Greek diakritikos separative, from diakrinein to distinguish, from dia- + krinein to separate — more at certain

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