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1. A word, phrase, verse, or sentence that reads the same backward or forward. For example: A man, a plan, a canal, Panama!
2. A segment of double-stranded DNA in which the nucleotide sequence of one strand reads in reverse order to that of the complementary strand.
[From Greek palindromos, running back again, recurring : palin, again; see kwel- in Indo-European roots + dromos, a running.]
pal′in·dro′mic (-drō′mĭk, -drŏm′ĭk) adj.
a word or phrase the letters of which, when taken in reverse order, give the same word or phrase, such as able was I ere I saw Elba
[C17: from Greek palindromos running back again, from palin again + -drome]
palindromic, palindromical adj
a word, line, verse, number, etc., reading the same backward as forward, as Madam, I'm Adam.
[1620–30; < Greek palíndromos recurring =pálin again, back + -dromos running (see -dromous)]
pal`in•drom′ic (-ˈdrɒm ɪk, -ˈdroʊ mɪk) adj.
pa•lin•dro•mist (pəˈlɪn droʊ mɪst) n.
A word or phrase that reads the same backwards.