macron /ˈmāˌkrän, , ˈmeɪˌkrɑn 
, ˈmaˌkrän, , ˈmæˌkrɑn , ˈmākrən, ˈmeɪkrən / ▸ noun a written or printed mark (¯) used to indicate a long vowel in some languages and phonetic transcription systems, or a stressed vowel in verse.
– ORIGIN mid 19th century : from Greek makron, neuter of makros ‘long’.
EnglishOxford New American Dictionary
