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
supply
Noun
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A supply is an amount of something that you can use when you need it.
We will need a supply of water.
During the war, the Americans destroyed their food supply.
Sadly these books are in very short supply in Britain.
The price of oil changes quickly to match supply and demand.
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Supplies are things like food, water, medicine, gasoline, etc. that people need when they are not near somewhere where they can get them easily.
The Japanese government is finally planning to send medical supplies and financial support.
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Supply is the act or system of supplying something.
They plan to fix the Russian economy and improve the supply of food and consumer goods.
The airplane's air supply wasn't working.
supply
Verb
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If you supply something, you make it available, usually regularly.
We were supplied with a few basic tools that we needed for the job.
Our garden supplies us with all the food we need.
The office was well supplied with chairs.
supply
Adverb
—
In a supple way.
filter
Noun
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A filter is a piece of equipment that put gas or liquid through to take out the parts you don't want, to clean it.
Car engines have a fuel filter to keep the fuel clean.
filter
Verb
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If you filter a gas or a liquid, you put it through something that takes out the parts you don't want.
We filter the water.