LATIN DICTIONARYLexicon Latīnum
letter

◌̄

Meaning

  1. diacriticA diacritical mark of the Latin script, called signum prōductiōnis (“lengthening sign”) in Latin, and found on Ā/ā, Ē/ē, Ī/ī, Ō/ō, Ū/ū and Ȳ/ȳ, used to denote a long vowel in grammars and dictionaries.

Quick answers

What does ◌̄ mean in Latin?
◌̄, a letter, means “A diacritical mark of the Latin script, called signum prōductiōnis (“lengthening sign”) in Latin, and found on Ā/ā, Ē/ē, Ī/ī, Ō/ō, Ū/ū and Ȳ/ȳ, used to denote a long vowel in grammars and dictionaries.”.