ac meaning and definition

AC noun

Definition of Ac (noun)

1. a radioactive element of the actinide series; found in uranium ores
   • synonyms: actinium, atomic number 89
2. an electric current that reverses direction sinusoidally
   • "In the US most household current is AC at 60 cycles per second"
   • synonyms: alternating current, alternating electric current
   • antonym: DC