Another collection of postings on to write about, because there’s such a variety of ways in which words or other expressions can have shortened variants (in spelling or pronunciation or both), and because different sources use different terminology.
Some distinctions I’ll make here, first between abbreviations broadly understood and truncations broadly understood. Clear examples of truncations are short forms of longer phrases, in which words that appear in the longer expressions are missing in the shorter. Truncations in this sense include brief idioms like that said, informal variants like time was ‘the time was’, telegraphic variants (as in newspaper headlines), and several other things. I have a posting in preparation on some examples of truncation, but truncations are outside the domain of this posting.
That leaves abbreviations, in which the result is a short word or word-like expression. Many of these — Dr(.) for Doctor, Prof. for Professor — are orthographic short forms. I’ll call these “ordinary abbreviations”, since they’re what most people think of first under the heading abbreviation.
Then there are clippings, another type of word shortening, in which the abbreviation is both phonological and orthographic: ad, exam, chute, flu.
Finally, there are several types of what I’ll call “alphabetic abbreviations”, in which a word is formed from the initial material (usually the initial letters) in the words of some longer expression. There are two main types, and unfortunately there are two competing terminological schemes (both used in Language Log).
The terminology I have used for some time (and will continue to use) is the following:
alphabetic abbreviations: acronyms, in which a sequence of letters is pronounced as a word, using the spelling (as in NATO); and initialisms, in which the abbreviation is pronounced as a sequence of letter-names (as in FBI).
Unfortunately, Geoff Pullum’s terminology (which follows that in CGEL) is different:
initialisms (the larger category): acronyms (as above); and abbreviations (pronounced letter-name by letter-name)
There is no issue of right or wrong here; these are simply different terminological conventions, and both can be defended. In any case, you’ve been warned.
The inventory below doesn’t including passing mentions of specific abbreviations. (more…)