Definition of macron
: a mark − placed over a vowel to indicate that the vowel is long or placed over a syllable or used alone to indicate a stressed or long syllable in a metrical foot
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Great Words for Scrabble
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- Which of the following Q-without-U words means the number five in cards or dice?

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Merriam-Webster unabridged
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Time Traveler for macron
The first known use of macron was in 1851
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