ri·bo·zyme (rī'bə-zīm') n. An RNA segment that has the ability to catalyze the cleavage and formation of covalent bonds in RNA strands at specific sites.
Main Entry: ri·bo·zyme Pronunciation: 'rI-b&-"zIm Function: noun : a molecule of RNA that functions as an enzyme (as by catalyzing thecleavage of other RNA molecules)