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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: * Envelope (mathematics), a curve, surface, or higher-dimensional object defined as being tangent to a given family of lines or curves (or surfaces, or higher-dimensional objects, respectively) 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: * Envelopes (band), an indie/pop band from Sweden and France, based in the UK * ''Envelope'' (film), a 2012 film 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 ==See also== * 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 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Envelope (disambiguation)」の詳細全文を読む スポンサード リンク
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