a.a.

noun3

1. •
   amino acid
2. •
   achievement age
3. •
   arteriae

noun6

1. •
   amino acid
2. •
   antiaircraft; antiaircraft artillery
3. •
   associate of arts / associate in arts (a degree)
4. •
   achievement age
5. •
   associate in accounting (a degree)
6. •
   arteriae