palindrome

1. (by extension) A poetic form in which the sequence of words reads the same in either direction.broadly

2. (by extension) A sequence of items that follows the same pattern both forwards and backwards.Examples: "A conjunct palindrome from notes 5 to 11, D D E F E D D, abuts the only melodically disjunct group E G D (notes 12–14), and at the same time contributes to a melodic sequence with the opening four notes."; "The shops opposite were a High Street palindrome — Korean gorocery, courier service, letting abgents, courier service, Korean grocery — and buses passed with noisy frequency."; "The color sequence in the palindrome skein is the same no metter whether you start from the left or right."broadly

3. (genetics) A stretch of DNA in which the sequence of nucleotides on one strand are in the reverse order to that of the complementary strand