It is a palindrome - a word or a number or a sequence of units that is able to be read the same way from either direction. Punctuation and spaces between the words or lettering is allowed.

http://home.hccnet.nl/jc.kuiper/palindromes/palindr3.htm

>NO MELON NO LEMON
>
>It's doesn't seem to be a palindrome, but it's something like one.
>What is it?