ribosome


ri·bo·some

noun \ˈrī-bə-ˌsōm\

Definition of RIBOSOME

:  any of the RNA-rich cytoplasmic granules that are sites of protein synthesis — see cell illustration
ri·bo·som·al \ˌrī-bə-ˈsō-məl\ adjective

First Known Use of RIBOSOME

1958

ri·bo·some

noun \ˈrī-bə-ˌsōm\   (Medical Dictionary)

Medical Definition of RIBOSOME

: any of the RNA- and protein-rich cytoplasmic granules that are sites of protein synthesis
ri·bo·som·al \ˌrī-bə-ˈsō-məl\ adjective

Illustration of RIBOSOME

ribosome

noun    (Concise Encyclopedia)

Tiny particle, the site of protein synthesis, that is present in large numbers in living cells. They occur both as free particles within cells and, in eukaryotes, as particles attached to the membranes of the endoplasmic reticulum. They are 40% protein and 60% RNA. Ribosomes account for a large proportion of the total RNA of a cell. Proteins newly formed on ribosomes detach and migrate to other parts of the cell to be used.

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