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macron: Meaning and Definition of

ma•cron

Pronunciation: (mā'kron, mak'ron), [key]
— n.
  1. a horizontal line used as a diacritic over a vowel to indicate that it has a long sound or other specified pronunciation, as (ā) in fate (fāt).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
macromutation macronucleate
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