Aa (disambiguation)

Aa, aa or aA may refer to:

Aa

Aa.:
- Aa., artery
- Aa., (Latin) arteria, as in instances in List of arteries
Aa!, a J-Pop musical group
Aa (architect), an architect in ancient Egypt
Aa (Big A Little a), an American noise rock group
Aa (digraph)
ʻAʻā (lava flow), a type of basaltic lava flow
Aa (plant), a genus of orchid
Aa (snail), subgenus in Philonesia
Aa (surname), a Scandinavian surname, notable people with the surname find there
Aa, Estonia, a village on northern coast of Estonia
Aa, Indonesia
Aa River (disambiguation), specific waterways in Europe
Aa, misdivision of surname van der Aa

(Terms where capitalizing the initial "a" would interfere with recognition of the established abbreviation)