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
ft
—
noun
(= foot)
a linear unit of length equal to 12 inches or a third of a yard
he is six feet tall