Encyclopedia > Envelope

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  1. An envelope is a container used for sending mail (letters) through the postal system.
  2. An envelope is a mathematical curve tangent to a family of lines.
  3. An envelope is a curve that bounds another curve or set of curves, as the modulation envelope of an amplitude-modulated carrier wave in electronics.

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... representation to serve four-year terms. There is some talk among monarchists in Brazil of restoring the monarchy as a symbol of national unity and political stability. ...

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