endoplasmic reticulum

(redirected from Smooth ER)
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reticulum

 [rĕ-tik´u-lum] (L.)
1. a small network, especially a protoplasmic network in cells.
agranular reticulum smooth-surfaced endoplasmic reticulum.
endoplasmic reticulum an ultramicroscopic organelle of nearly all higher plant and animal cells, consisting of a system of membrane-bound cavities in the cytoplasm, occurring in two types: granular or rough-surfaced, bearing large numbers of ribosomes on its outer surface, and agranular or smooth-surfaced.
granular reticulum rough-surfaced endoplasmic reticulum.
sarcoplasmic reticulum a form of agranular reticulum in the sarcoplasm of striated muscle, comprising a system of smooth-surfaced tubules surrounding each myofibril.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

en·do·plas·mic re·tic·u·lum (ER),

the network of cytoplasmic tubules or flattened sacs (cisternae) with (rough ER) or without (smooth ER) ribosomes on the surface of their membranes in eukaryotes.
Synonym(s): endomembrane system
Farlex Partner Medical Dictionary © Farlex 2012

endoplasmic reticulum

n.
A membrane network within the cytoplasm of cells involved in the synthesis, modification, and transport of cellular materials.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

en·do·plas·mic re·tic·u·lum

(ER) (en'dō-plas'mik rĕ-tik'yū-lŭm)
The network of cytoplasmic tubules or flattened sacs (cisternae) with (rough ER) or without (smooth ER) ribosomes on the surface of their membranes in eukaryotes.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

endoplasmic reticulum

A highly convoluted membrane system within cells to which RIBOSOMES attach themselves for protein synthesis. The endoplasmic reticulum is also the site of many other cell metabolic reactions.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

endoplasmic reticulum (ER)

a series of interconnected, flattened cavities called cysternae, lined with a thin membrane about 4 nm thick which is continuous with the NUCLEAR MEMBRANE. It can be covered with RIBOSOMES, when it is referred to as rough ER, or ribosomes may be absent in which case the ER is known as smooth ER and is associated with lipid synthesis. See GOLGI APPARATUS.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

en·do·plas·mic re·tic·u·lum

(ER) (en'dō-plas'mik rĕ-tik'yū-lŭm)
The network of cytoplasmic tubules or flattened sacs with or without ribosomes on the surface of their membranes.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
olfersi ovarian chromatophores (McNamara and Ribeiro, 1999) reveals that structural continuity may be provided by the smooth ER, which according to McNamara and Sesso (1982) "engulfs [the] amembranous granules and in places appears continuous with the membrane bounded granules" in the ventral nerve cord chromatophores of palaemonid shrimp.
Notable exceptions are the erythrophores of goldfish and swordtail that contain slow-moving pigment granules bound together by the smooth ER (Taylor, 1992) in a structural continuum similar to that described for Palemon affinis and M.