See also: Appendix:Variations of "aa"
English
Adjective
A-a (not comparable)
- (physiology) Initialism of alveolar-arterial.
A-a gradient
German
Noun
A-a n or f (strong, genitive A-as or A-a, no plural)
- alternative spelling of Aa (“feces, poop”)
Declension
Declension of A-a [sg-only, neuter // feminine, strong]