Definition of ack

"ack" is probably misspelled. Trying AC instead Definition of AC

1. Ac [ n ] a radioactive element of the actinide series; found in uranium ores

Synonyms actinium atomic_number_89 Ac Related Terms chemical_element uranium_ore

2. AC [ n ] an electric current that reverses direction sinusoidally
Examples: "In the US most household current is AC at 60 cycles per second"

Synonyms AC alternating_current Related Terms direct_current electricity

  AC
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  Acy
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  Acey
  Achee
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