Linguistic term for the diacritical mark (¯) placed over a vowel to indicate a long sound. In Japanese contexts, often refers to the long-vowel mark used in rōmaji or the ー (chōonpu) in kana.
See also: 長音符
When indicating a long vowel in rōmaji, a macron is placed over the vowel.
This dictionary uses macrons to indicate long vowels.