(polyribosome) n. a structure that occurs in the cytoplasm of cells and consists of a group of *ribosomes linked together by *messenger RNA molecules: formed during protein synthesis.
n. a particle, consisting of RNA and protein, that occurs in cells and is the site of protein synthesis in the cell (see translation). Ribosomes are either attached to the *endoplasmic reticulum or free in the cytoplasm as *polysomes. —ribosomal adj.... ribosome
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