Englishfor English speakers
amplitude
Noun
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The measure of how big something is.
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The biggest possible absolute value of the vertical part of a periodic curve.
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The biggest possible absolute value of something that changes periodically (like a wave).
movement
Noun
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A movement, is a group of people who are all working for the same idea.
The labour movement protects the rights of the workers.
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A movement is a part in a musical composition such as a sonata or symphony.
The first movement of the "Moonlight" Sonata is very famous.