By definition, pi is the ratio of the circumference of a circle to its diameter. Pi is always the same number, no matter which circle you use to compute it. For the sake of usefulness people often need to approximate pi.
Definition and Examples of Literary Terms. The term palindrome is derived from two Greek words âpalinâ means again and âdromosâ means way or direction. It is defined as a number, a word, a sentence, a symbol or even signs that can be read forward as well as backward or in reserve order with the same effects and meanings.
palindrome(noun) a word or phrase that reads the same backward as forward. palindrome(Noun) A word, phrase, number or any other sequence of units which has the property of reading the same forwards as it does backwards, character for character, sometimes disregarding punctuation, capitalization and diacritics. Level, madam and racecar are examples of single word palindromes.