The definition of a ribosome is a tiny particle made up of nucleic acids and proteins that exist in large numbers in the gel-like substance in between every cell in the body.
An example of a ribosome is one of the particles located outside of a cell that helps build proteins.
See ribosome in Webster's New World College Dictionary
Origin: < ribose + -some
See ribosome in American Heritage Dictionary 4
Origin: ribo(nucleic acid)
Origin: + -some3.
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