A word created from preliminary letters of a name, such as for example WAC for Women's Army Corps, or by combining initial letters or parts of a number of words, such radar for radio detecting and ranging.
An abbreviation created by (usually preliminary) letters extracted from a word or variety of words, that's itself pronounced as a word, such as for instance RAM, radar, or scuba; occasionally contrasted with initialism.
A pronounceable word created from beginnings (letter or syllable) of various other words and thus representing the term so-formed, e.g. Benelux = the nations Belgium, Netherlands and Luxembourg thought to be a political or financial whole.
Any acronym so-formed, irrespective of pronunciation, including TNT, IBM, or XML.
a word formed from the initial letters of this a few terms when you look at the title