Aa Definition

ää
noun
Lava having a rough surface.
American Heritage
A type of basaltic rock, usually dark-colored with a jagged surface, formed in large sheets from slow-moving lava.
Webster's New World
Alternative spelling of açai.
Wiktionary
Synonyms:
abbreviation
Acts of the Apostles.
American Heritage
Alcoholics Anonymous.
Webster's New World
Antiaircraft.
Webster's New World
Associate in (or of) Arts.
Webster's New World
Associate in Arts.
American Heritage
symbol

(metrology) Symbol for the attoampere, an SI unit of electrical current equal to 10−18 amperes.

Wiktionary

Origin of Aa

  • Hawaiian ‘a‘ā to burn, aa

    From American Heritage Dictionary of the English Language, 5th Edition

Words Near Aa in the Dictionary