Englishfor English speakers
Ac
—
noun
(= actinium)
a radioactive element of the actinide series; found in uranium ores
AC
—
noun
an electric current that reverses direction sinusoidally
In the US most household current is AC at 60 cycles per second
signaling
—
noun
(= signal)
any nonverbal action or gesture that encodes a message
signals from the boat suddenly stopped