Also found in: Dictionary, Thesaurus, Encyclopedia.


Plural of reticulum.


Plural of reticulum.


(re-tik'yu-lum) (-la) plural.reticula [L. reticulum, a little net, network]
A network.

endoplasmic reticulum

Abbreviation: ER
A cell organelle that is a complex network of membranous tubules in the cytoplasm between the nuclear and cell membranes; it is visible only with an electron microscope. One form with ribosomes attached is called granular or rough ER; another form that is free of ribosomes is called agranular or smooth ER. Rough ER transports proteins produced on the ribosomes; smooth ER synthesizes lipids.
See: cell for illus

reticulum of nucleus

The netlike contents of a nondividing nucleus of a cell; the chromatin, the long, uncoiled chromosomes.

sarcoplasmic reticulum

The endoplasmic reticulum of striated muscle cells, surrounding the sarcomeres. In response to an action potential, it releases calcium ions to induce contraction, then reabsorbs calcium ions to induce relaxation.

stellate reticulum

The enamel pulp of a developing tooth, consisting of stellate cells lying between the inner and outer epithelial layers of the enamel organ.
References in periodicals archive ?
(4) Se le llama reticula a cualquier estructura trazada que se organiza por cuadros de igual tamano y distribucion.
Rough endoplasmic reticula and secretory granules with diverse and lower electron density were scattered in the cytoplasm (Fig.
Para materializado, el artista crea una reticula continua que cruza aleatoriamente el espacio con hilos de niquel tensados por la atraccion de pequenos imanes esfericos que rematan sus puntas.
In the pituitaries from control rats at all time points after DEN administration, most of the granular cells were of the storage type, characterized by many secretory granules and an inactive appearance, with poor development of endoplasmic reticula (ER) and Golgi complex (Figure 1), as described in detail by others (13,37).