Also, a nucleic acid sequence whose 5'-to-3' sequence is identical on each DNA strand. The sequence is the same when one strand is read left to right and the other strand is read right to left. Recognition sites of many restriction enzymes are palindromic.

Based on work I did for the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.