Envelope (disambiguation)

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An envelope is the paper container used to hold a letter being sent by post.

Envelope may also refer to:

In mathematics:

In science:

  • Viral envelope, the membranal covering surrounding the capsid of a virus
  • Cell envelope of a bacterium, consisting of the cell membrane, cell wall and outer membrane

In applied science:

  • Envelope (waves), a curve joining the peaks of an oscillating waveform or signal
  • Envelope detector, an electronic circuit used to measure the envelope of a waveform
  • ADSR envelope, the variation of a sound over time, as is used in sound synthesis
  • Envelope (motion), a solid representing all positions that an object may occupy during its normal range of motion
  • Flight envelope, the limits within which an aircraft can operate
  • Building envelope, the exterior layer of a building that protects it from the elements
  • Envelope (airships), the fabric skin covering the airship

In entertainment:

Other uses:

  • Envelope (poetry), a poetic device in which a line or a stanza is repeated to enclose a section of verse
  • Envelope (military) (also envelop) attacking one or both of the enemy's flanks to encircle the enemy
  • The envelope of an Internet Email is its SMTP routing information. The addresses in the envelope are often present in the header portion of the contents, but not for, e.g., Blind carbon copy.

See also[edit]

  • Two envelopes problem, a paradox
  • Common envelope event, a short-lived phase in the evolution of a binary star in which the larger of the two stars has initiated unstable mass transfer to its companion star