anacronym

Etymology
Perhaps but perhaps, in either case indicating an acronymic word that has lost much of its acronymic identity because people usually no longer focus on the etymonic origin when using the word.

Noun

 * 1) An acronym that is no longer seen as such, but instead treated as a regular word and styled in lowercase despite its etymological origin.

Usage notes
Do not confuse an anacronym (such as or ) with an anachronym (such as  or ), despite the homophony of the terms.