"ribosome" in the noun sense
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
"the ribosome is the site of protein synthesis"
Source: WordNet® (An amazing lexical database of English)
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