Palindrome

Palindrome

A Palindrome is a word, phrase, number, or other sequence of characters that reads the same forward and backward, ignoring spaces, punctuation, and capitalization. It is derived from the Greek words "palin," which means "again," and "dromos," which means "way" or "direction."

Etymology

The term "palindrome" was first coined by the English playwright Ben Jonson in the 17th century from the Greek words "palin," meaning "again," and "dromos," meaning "way" or "direction."

Types of Palindromes

Palindromes can be classified into several types:

• Word Palindromes: These are words that are spelled the same way forward and backward. Examples include "radar," "level," and "rotor."

• Phrase Palindromes: These are phrases or sentences that read the same way forward and backward. An example is "Able was I ere I saw Elba," a phrase often attributed to Napoleon Bonaparte.

• Number Palindromes: These are numbers that remain the same when their digits are reversed. An example is 12321.

• Musical Palindromes: These are pieces of music that sound the same when played forward or backward.

In Mathematics

In mathematics, a palindrome number is a number that remains the same when its digits are reversed. Palindromic numbers are studied in Recreational mathematics because of their aesthetic appeal.

In Biology

In biology, a palindromic sequence is a nucleic acid sequence in a double-stranded DNA or RNA molecule wherein reading in a certain direction on one strand matches the sequence reading in the same direction on the complementary strand.

See Also

• Ambigram
• Anagram
• Tautonym

References

Palindrome Resources
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