A1 [ā]
1. a blood type: see ABO SYSTEM
2. Educ. a grade indicating excellence [an A in history]
3. Music
a) the sixth tone or note in the ascending scale of C major
b) a key, string, etc. producing this tone
c) the scale having this tone as the keynote
first-class; A 1: see A ONE
1. Physics absolute
2. adenine
3. America(n)
4. ampere
5. analog
6. angstrom: also Å
7. anode
8. answer
9. April
10. Chem. Archaic argon
11. Baseball Basketball Hockey assist(s)
12. attendance
13. August

English World dictionary. . 2014.

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