envelope

In anatomy, a structure that encloses or covers.
- corneocyte e. an electron-dense, 10–15 nm thick layer of highly cross-linked protein on the cytoplasmic surface of the cell membrane of epidermal corneocytes; it is highly resistant to proteolytic agents. SYN: subplasmalemmal dense zone.
- nuclear e. the double membrane at the boundary of the nucleoplasm; it has regularly spaced pores covered by a disklike nuclear pore complex and a space or cisterna about 150 Å wide between the two layers; the outer membrane is continuous at intervals with the endoplasmic reticulum. SYN: caryotheca, karyotheca, nuclear membrane.
- viral e. the outer structure or coat that encloses the nucleocapsids of some viruses that mature by budding through the membrane cell; may contain lipoprotein.

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en·ve·lope 'en-və-.lōp, 'än- n a natural enclosing covering (as a membrane or integument)

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en·ve·lope (enґvə-lōp) [Old Fr. enveloper to wrap up] 1. an encompassing structure or membrane. 2. in virology, a lipoprotein bilayer surrounding the capsid of some viruses, acquired by budding through the cell membrane of the host cell; the lipids are derived from the host cell and the proteins are encoded by the virus. Called also peplos. 3. in bacteriology, the cell wall and the plasma membrane considered together.

Medical dictionary. 2011.

Synonyms:
, , , / (to cover a weak part) /


Look at other dictionaries:

  • envelope — en‧ve‧lope [ˈenvələʊp ǁ loʊp] noun [countable] a thin paper cover in which you put a letter ˌpadded ˈenvelope an envelope filled with soft material that is used for sending things which can easily be damaged ˌself adˌdressed ˈenvelope written… …   Financial and business terms

  • Envelope — En vel*ope (?; 277), Envelop En*vel op (?; 277), n. [F. enveloppe.] 1. That which envelops, wraps up, encases, or surrounds; a wrapper; an inclosing cover; esp., the cover or wrapper of a document, as of a letter. [1913 Webster] 2. (Astron.) The… …   The Collaborative International Dictionary of English

  • envelope — ► NOUN 1) a flat paper container with a sealable flap, used to enclose a letter or document. 2) a covering or containing structure or layer. 3) the outer housing of a vacuum tube, electric light, etc. 4) the structure within a balloon or non… …   English terms dictionary

  • envelope — [än′və lōp΄, en′′və lōp΄] n. [Fr & OFr enveloppe < OFr envoluper: see ENVELOP] 1. a thing that envelops; wrapper; covering 2. a folded paper container as for a letter, usually with a gummed flap for sealing 3. a) the outer covering of a rigid… …   English World dictionary

  • Envelope —   [engl.], Hüllkurve …   Universal-Lexikon

  • envelope — 1705, from Fr. enveloppe (13c.), a back formation from envelopper to envelop (see ENVELOP (Cf. envelop)) …   Etymology dictionary

  • envelope — s. m. Envoltório para cartas ou outros documentos ou papéis. = SOBRECARTA, SOBRESCRITO   ‣ Etimologia: francês enveloppe …   Dicionário da Língua Portuguesa

  • envelope — [n] wrapper bag, box, case, casing, cloak, coat, coating, container, cover, covering, enclosure, hide, jacket, pocket, pouch, receptacle, sheath, shell, skin, vesicle, wrapping; concept 494 …   New thesaurus

  • Envelope — This article is about envelopes in packaging. For other uses, see Envelope (disambiguation). Front of an envelope mailed in the U.S. in 1906, with a postage stamp and address …   Wikipedia

  • envelope — noun ADJECTIVE ▪ bulky, fat, thick ▪ large, small ▪ sealed ▪ return (AmE), self addressed …   Collocations dictionary

  • envelope — n. 1) to address; seal an envelope 2) a pay envelope (AE; BE has pay packet) 3) a self addressed; stamped; window envelope USAGE NOTE: AE has stamped self addressed envelope; BE has stamped addressed envelope. * * * [ envələʊp] seal an envelope… …   Combinatory dictionary

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