jcarrico·2 lata temu·discussFrom Merriam Webster:a word (such as NATO, radar, or laser) formed from the initial letter or letters of each of the successive parts or major parts of a compound termalso : an abbreviation (such as FBI) formed from initial letters : initialismIt appears the meaning of the word has changed over time.
jcarrico·3 lata temu·discussIf you like this, definitely check out WordNet (https://wordnet.princeton.edu/)
a word (such as NATO, radar, or laser) formed from the initial letter or letters of each of the successive parts or major parts of a compound term
also : an abbreviation (such as FBI) formed from initial letters : initialism
It appears the meaning of the word has changed over time.