aA
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See also: Appendix:Variations of "aa"
Translingual[edit]
Symbol[edit]
aA
- (metrology) Symbol for attoampere, an SI unit of electrical current equal to 10−18 amperes.
- (obsolete, metrology) Symbol for the abampere, a CGS unit of electrical current equal to 10 amperes.
Usage notes[edit]
The use of the abampere and related CGS units had largely been displaced by the MKS system by 1964 when the SI prefix atto- came into use. Thus a knowledge of when the quantity in question was written will usually be sufficient to determine which meaning of aA was intended.
Egyptian[edit]
Romanization[edit]
aA