N-COUNT （尤用作名称）首字母缩拼词，首字母缩略词 An acronym is a word composed of the first letters of the words in a phrase, especially when this is used as a name. An example of an acronym is NATO which is made up of the first letters of the 'North Atlantic Treaty Organization'. （尤用作名称）首字母缩拼词，首字母缩略词