n. Any of a group of enzymes which cleave single nucleotides from the end of a polynucleotide (DNA or RNA) chain.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a nuclease that releases one nucleotide at a time (serially) beginning at one of a nucleic acid
Word Usage
"Ulmer settled on a method of sequencing single molecules of DNA, using an enzyme called exonuclease to nibble off bases from an unfurled DNA strand like a PacMan video game."