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
commutator
—
noun
switch for reversing the direction of an electric current
machine
Noun
—
A machine is a man-made object with moving parts.
I'm putting the clothes in the washing machine. Is there anything you want washed?
This new machine is the fastest computer I've ever had.
machine
Verb
—
If you machine something you fasten or shape it with a machine.