A-

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Look up a- in Wiktionary, the free dictionary.

A- may refer to:

• A- (plane), a U.S. military aircraft prefix
• A- blood, blood type A negative.
• A- (grade), a letter grade in the four point grade system, above 'B+', but below an 'A'
• Privative a, a prefix expressing negation
• Ā

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