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.
Here is an example of a sentence that reads the same word by word forward and backward: Blessed are they that believe that they are blessed. The word palindrome isn't one. But words such as noon, toot, peep, mom, dad, pop, Eve, kook, did, wow are.