Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A structure composed of RNA and protein, present in large numbers in the cytoplasm of living cells and serving as the site for assembly of polypeptides encoded by messenger RNA.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun biology Small organelles found in all cells; involved in the production of proteins by translating messenger RNA.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun an organelle in the cytoplasm of a living cell; they attach to mRNA and move down it one codon at a time and then stop until tRNA brings the required amino acid; when it reaches a stop codon it falls apart and releases the completed protein molecule for use by the cell

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[ribo(nucleic acid) + –some.]

Examples

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