Englishfor English speakers
indicator
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noun
(= index)
a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
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noun
a signal for attracting attention
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noun
a device for showing the operating condition of some system
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noun
(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction
needle
Noun
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A needle is a small, long, thin sharp metal thing with a hole in it, used for sewing.
She used a needle and blue thread to fix the hole in the shirt.
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A needle is a long, thing, sharp metal thing for putting drugs into a person through the skin.
The doctor used the needle to inject the medicine into the patient.
needle
Verb
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To tease; to make fun of.
Billy needled his sister incessantly about her pimples.