word, phrase, number, or other sequence of units that may be read the same way in either direction
A palindrome is a word or a phrase that has the property of reading the same in either direction. Spacing and punctuation do not matter.
- Able was I ere I saw Elba.
- A man, a plan, a canal: Panama!
- Leigh Mercer, Notes and Queries, November 13, 1948
- A man, a plan, a canoe, pasta, heros, rajahs, a coloratura, maps, snipe, percale, macaroni, a gag, a banana bag, a tan, a tag, a banana bag again (or a camel), a crepe, pins, Spam, a rut, a Rolo, cash, a jar, sore hats, a peon, a canal – Panama
- Lewd did I live & evil I did dwel
(Lewd did I live, evil I did dwel)
- Si Nummi immunis.
- Sator arepo tenet opera rotas.
- In girum imus nocte et consumimur igni.
- Translation: We go about in the night and are consumed by fire.
- quoted in The concise Oxford companion to English literature, 2007
- "Bob" by "Weird Al" Yankovic, a song consisting entirely of palindromes.
- Twain, Mark (1866). "Bosidevele No Droschdt". The Galaxy, Vol. 1. Google Book Search. Retrieved on 2007-10-03. Digital version: Twain, Mark (19 March 2007)  (PDF). The Galaxy, Vol. 1. W.C. and F.P. Church (original). pp. 755 pp.. Retrieved on 2007-10-03.