1) An acronym 
(from the article `abbreviation`) Acronyms are to be distinguished from initialisms such as U.S.A. and NCAA, which are spoken by reciting their letters.
Any word, whether an acronym or an alphabetism, formed from the first letters of other words. See di
a name or term formed from the initial letters of a group of words and pronounced as a separate word, as NATO for North Atlantic Treaty Organization; an acronym. · a set of initials representing a name, organization, or the like, with each letter pronounced separately, as FBI for Federal Bureau of Investigation. · the practice of using...