say it: dahy-uh-KRIT-uh-kuhl
diacritical is an adjective meaning "capable of distinguishing". It carries one recorded sense.
capable of distinguishing
“students having superior diacritic powers”
“the diacritic elements in culture”
Definitions, synonyms and semantic relations for diacritical come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.