<p><strong>Noun</strong></p><ul><li>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."</li><li>Biochemistry: 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.</li></ul><p><strong>End of Response</strong></p>