acronym
noun [ C ] uk/ˈæk.rə.nɪm/ us/ˈæk.rə.nɪm/
首字母缩拼词，首字母组合词，首字母缩略词
an abbreviation consisting of the first letters of each word in the name of something, pronounced as a word
AIDS is an acronym for "Acquired Immune Deficiency Syndrome". AIDS （艾滋病）是 Acquired Immune Deficiency Syndrome（获得性免疫缺损综合征）的首字母缩拼词。