ribosome: 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
organelle: a specialized part of a cell; analogous to an organ
hyacinth: a red transparent variety of zircon used as a gemstone