Macron

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Macron \Ma"cron\, n. [NL., fr. Gr. ? long.] (Pron.)
     A short, straight, horizontal mark [-], placed over vowels to
     denote that they are to be pronounced with a long sound; as,
     [=a], in d[=a]me; [=e], in s[=e]am, etc.
  
     Syn: macrotone.


          [1913 Webster]

From WordNet (r) 2.0 [wn]:

  macron
       n : a diacritical mark (-) placed above a vowel to indicate a
           long sound