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[pal-in-drohm] /ˈpæl ɪnˌdroʊm/
a word, line, verse, number, sentence, etc., reading the same backward as forward, as Madam, I'm Adam or Poor Dan is in a droop.
Biochemistry. a region of DNA in which the sequence of nucleotides is identical with an inverted sequence in the complementary strand:
GAATTC is a palindrome of CTTAAG.
Origin of palindrome
1620-30; < Greek palíndromos recurring, equivalent to pálin again, back + -dromos running (see -drome)
Related forms
[puh-lin-droh-mist] /pəˈlɪn droʊ mɪst/ (Show IPA),
[pal-in-drom-ik, -droh-mik] /ˌpæl ɪnˈdrɒm ɪk, -ˈdroʊ mɪk/ (Show IPA),
palindromical, adjective
palindromically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for palindrome


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
Derived Forms
palindromic (ˌpælɪnˈdrɒmɪk) adjective
Word Origin
C17: from Greek palindromos running back again, from palin again + -drome
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for palindrome

"line that reads the same backward and forward," 1620s, from Greek palindromos "a recurrence," literally "a running back," from palin "again, back" (from PIE root *kwel- "move round," with notion of "revolving; see cycle (n.)) + dromos "a running" (see dromedary). Related: Palindromic.

Online Etymology Dictionary, © 2010 Douglas Harper
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palindrome in Medicine

palindrome pal·in·drome (pāl'ĭn-drōm')
A segment of double-stranded DNA in which the nucleotide sequence of one strand reads in reverse order to that of the complementary strand.

pal'in·dro'mic (-drō'mĭk, -drŏm'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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