|an extraordinary or unusual thing, person, or event; an exceptional example or instance.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
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.
palindromic pal·in·dro·mic (pāl'ĭn-drō'mĭk, -drŏm'ĭk)