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.
1. Adjective A large mass of silly string floating in the air offers the mind a vivid image of what a ribosome looks like. 2. Noun, singular or mass The ribosome is one of the most complex parts of the inside of a cell.
