envelope

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envelope

 [en´vĕ-lōp]
1. an encompassing structure or membrane.
2. in virology, the outer lipoprotein coat of a large virus, surrounding the capsid and usually furnished, at least partially, by the host cell. Called also peplos.
3. in bacteriology, the cell wall and the plasma membrane considered together.
nuclear envelope the condensed double layer of lipids and proteins enclosing the cell nucleus and separating it from the cytoplasm; its two concentric membranes, inner and outer, are separated by a perinuclear space.

en·ve·lope

(en'vĕ-lōp), Avoid the mispronunciation ahn'vĕ-lōp.
In anatomy, a structure that encloses or covers.

envelope

/en·ve·lope/ (en´vĕ-lōp)
1. an encompassing structure or membrane.
2. in virology the peplos, a coat surrounding the capsid and usually furnished at least partially by the host cell.
3. in bacteriology, the cell wall and the plasma membrane considered together.

nuclear envelope  the condensed double layer of lipids and proteins enclosing the cell nucleus and separating it from the cytoplasm; its two concentric membranes, inner and outer, are separated by a perinuclear space.

envelope

(ĕn′və-lōp′, ŏn′-)
n.
Biology An enclosing structure or cover, such as a membrane or the outer coat of a virus.

en·ve·lope

(en'vĕ-lōp)
anatomy Any structure that encloses or covers.

envelope

any enclosing structure, such as a membrane or skin. In bacteria, it is the part of the cell enclosing the cytoplasm, i.e. the cytoplasmic membrane cell wall and capsule. In VIRUSES, it is the outer lipid-containing layer of some virions.

en·ve·lope

(en'vĕ-lōp)
In anatomy, a structure that encloses or covers.

envelope

an encompassing structure or membrane. In virology, a bilayer lipoprotein membrane with glycoprotein spikes surrounding the nucleocapsid and usually furnished, at least partially, by the host cell. In bacteriology, the cell wall and the plasma membrane considered together.

nuclear envelope
the condensed double layer of lipids and proteins enclosing the cell nucleus and separating it from the cytoplasm; its two concentric membranes, inner and outer, are separated by a perinuclear space.
References in classic literature ?
As I glanced at the box I noticed, with a start, that upon the lid was printed the treble K which I had read in the morning upon the envelope.
You were good enough to give me an appointment, sir," said I, humbly, producing his envelope.
The station-master tore open the envelope and read the few lines contained therein.
Gordon Jones, who had been talking to the bishop, leaned towards him and pointed to the envelope.
It was the envelope of the fatal letter which Mademoiselle Violet had written him to Queenstown.
While I am writing my letter, suppose you direct the envelope.
was all I said pointing to the envelope which he had laid on the table.
A thin envelope from an editor in the morning's mail was more stimulating than half a dozen cocktails.
The president tore open the envelope, read the dispatch, and, despite his remarkable powers of self-control, his lips turned pale and his eyes grew dim, on reading the twenty words of this telegram.
It was a long commercial envelope of ordinary type, and although the flap was secured with a blob of sealing wax, there was no particular impression upon it.
She had received her orders to join her pupils, in a note which was written upon an old envelope, and which contained the following words:
He tore open the envelope, and drew out a single half-sheet of note-paper.