Pronunciation: (pal'in-drōm"), [key]
1. a word, line, verse, number, sentence, etc., reading the same backward as forward, as Madam, I'm Adam or Poor Dan is in a droop.
2. Biochem.a region of DNA in which the sequence of nucleotides is identical with an inverted sequence in the complementary strand: GAATTC is a palindrome of CTTAAG.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.