n .
a word made up of the initials of other words 여러 단어의 머리글자만 따서 만든 단어, 두문자어

• Radar is an _____. The letters that from it stand for Radio Detecting And Ranging.
• Radar is also a palindrome, that is a word or expression that reads the same way for right to left as it does form left to right. According o the Guinness Book of World Records, the longest palindromic composition ever written - beginning "Al, sign it, 'Lover' ..." and ending "... revolting, Isla" - is 100,000 words long.