for Professor), an acronym is-in the broad sense-formed from the first letter or first few letters of each important word in a phrase (such as AIDS, from acquired immuno-deficiency syndrome, and scuba from self-contained underwater breathing apparatus). Whereas an abbreviation may be any type of shortened form, such as words with the middle omitted (for example, Rd for Road or Dr for Doctor) or the end truncated (as in Prof. 7.2 Redundant acronyms and RAS syndrome.7 Changes to (or wordplay on) the expanded meaning.6.2.4 Pronunciation-dependent style and case.6.1.2 Representing plurals and possessives.6.1.1.2 Pronunciation-dependent style and periods.4 Comparing a few examples of each type.Dictionary and style-guide editors are not in universal agreement on the naming for such abbreviations, and it is a matter of some dispute whether the term acronym can be legitimately applied to abbreviations which are not pronounced "as words", nor do these language authorities agree on the correct use of spacing, casing, and punctuation. The broader sense of acronym-the meaning of which includes terms pronounced as letters-is sometimes criticized, but it is the term's original meaning and is in common use. They can also be a mixture, as in radar ( RAdio Detection And Ranging).Īcronyms can be pronounced as words, like NASA and UNESCO as individual letters, like FBI, TNT, and ATM or as both letters and words, like JPEG (pronounced JAY-peg) and IUPAC. Acronyms are usually formed from the initial letters of words, as in NATO ( North Atlantic Treaty Organization) and EU ( European Union), but sometimes use syllables, as in Benelux (short for Belgium, the Netherlands, and Luxembourg). Word or name made from the initial components of the words of a sequenceĪn acronym is a word or name formed from the initial components of a longer name or phrase.
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