A palindrome is a work, verse, number or what have you that reads the same
backward as forward. The unit in a palindrome may vary. Each of the five lines
in the poem at the beginning of this article is itself a palindrome using a
letter as the unit. However, a palindromic poem might be written for which the
entire poem is a palindrome rather than the individual lines. The unit in
apalindrome might also be a word as in