restriction enzyme(n = noun.substance) restriction endonuclease, restriction nuclease - any of the enzymes that cut nucleic acid at specific restriction sites and produce restriction fragments; obtained from bacteria (where they cripple viral invaders); used in recombinant DNA technology;
is a kind of endonuclease

angiotensin converting enzyme, angiotensin-converting enzyme inhibitor, enzyme, proteolytic enzyme, restriction, restriction endonuclease, restriction fragment, restriction nuclease, restriction site