Abbreviation Rules | NerdyMates

It means “that is.” Use i.e. when you want to provide more specific information about something you mentioned.

If you need to use an indefinite article before an acronym or initialism, use the initial sound of the word (not necessarily the initial letter) guide your choice.

p.m. (post meridiem) = after noon

Below are a few other abbreviations that are common in English. Remember that abbreviations are not always completely standardized. One style guide may advise you to abbreviate Thursday as Thurs. while another may argue for Thu. Likewise, some style guides allow you to omit the periods with these abbreviations, but it’s never wrong to include periods. So if you aren’t sure whether to use the periods, err on the side of leaving them in.

etc.: et ceteraMs. = (pronounced “miss” or “miz”)We expect volunteers from many surrounding cities, (e.g., Springfield, Oakdale, Hogsmeade.)

My cat weighs 10 lbs., which is about 4.5 kg.

Initialisms are similar to acronyms in that they are also formed using the first letter of each word in a longer phrase. Unlike acronyms, however, initialisms are pronounced as a series of letters. NFL (National Football League), for example, is pronounced en-eff-ell.

One thing to remember about abbreviations is that certain ones are considered informal. If you are writing something very formal, it’s better to err on the side of spelling things out. The other thing to remember is that some readers may not know what an abbreviation means. If the abbreviation is obscure or unfamiliar, make sure to explain what it means the first time you use it.

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An abbreviation, simply put, is a shortened form of a word. In writing, abbreviations are useful when you need to squeeze a lot of writing into a small space. You can also use them in place of long or cumbersome phrases to make your sentences easier to read.

g. (gram)M.B.A. = Master of Business Administration


Molly Beagle, Ph.D., runs the canine cognition lab at Stanford University.

a.m. (ante meridiem) = before noon

mm. (millimeters)The mall opens at 10 a.m. and closes at 8 p.m.

Titles such as mister, miss, and doctor, as well as the names of academic degrees such as bachelor of arts and doctor of philosophy are almost always abbreviated. In American English, title abbreviations are followed by a period; in British English, the period is omitted.

M.A. = Master of Arts

The most common academic degree abbreviations include:

Jr. = JuniorIt means “and so forth.” Use it when you’re providing a partial list of details.The U.S. highway system seems enormous to visitors from the U.K.

Mr. = Mister

The periods are optional with abbreviations of academic degrees. Follow whichever style your style guide recommends, or just choose one and use it consistently. When an academic degree is used like a title, it follows a person’s name and is set off by commas:

Sr. = Senior

An acronym is pronounced as a single word, rather than as a series of letters. NASA, for instance, is an acronym. It stands for National Aeronautics and Space Administration. Occasionally, an acronym becomes so commonplace that it evolves into an ordinary word that people no longer think of as an acronym. The words scuba and laser, for instance, originated as acronyms (self contained underwater breathing apparatus and light amplification by stimulated emission of radiation, respectively).

i.e.: id est

Abbreviations for Courtesy Titles and Academic Degrees

Mr. Green asked Ms. Grey if she had met Dr. Jekyl. (American style)

U.A.E. (United Arab Emerates)

m. (meters)

Units of Measurement

Latin Abbreviations

B.S. = Bachelor of sciencethat makes sure everything you type is clear, effective, and mistake-free.

e.g.: exempli gratia

Other Common Abbreviations

lbs. (pounds)

It means “for example.” Use e.g. when you want to provide specific examples of a generalization.

Mr Green asked Ms Grey if she had met Dr Jekyl. (British style)

After a reasonable amount of time has passed—i.e. two business days—please report the missing shipment to our customer service department.

You should see the doctor when you have flu-like symptoms (fever, chills, etc.)

Abbreviations come in a few different varieties. Both acronyms and initialisms are abbreviations that are formed by combining the first letter of each word in a longer name or phrase. Typically, acronyms and initialisms are written in all capital letters to distinguish them from ordinary words.

The most common title abbreviations include:

mg. (milligram)Mrs. = Mistress (pronounced “missus”)kg. (kilogram)

U.S. (United States)E.U. (European Union)

There is a small handful of abbreviations for Latin terms that are used (and misused) frequently in English writing. Use periods with these abbreviations.

Ph.D. = Doctor of Philosophy

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Times and dates

ft. (feet)cm. (centimeters)The class will run Mon.-Fri. next week.

in. (inches)

Mon., Tues., Wed., Thurs., Fri., Sat,. Sun.

U.K. (United Kingdom)

Acronyms and Initialisms

B.A. = Bachelor of Arts

Internet slang often takes the form of initialisms: LOL, IDK, IMO, BRB. Although this type of slang isn’t appropriate for important correspondence like emails to your professor or colleagues, or in online comments when you want to be taken seriously, it can be handy for informal online chatting, especially if you type slowly.

Dr. = Doctor

Jan., Feb., Mar., Apr., May, Jun., Jul., Aug., Sep., Oct., Nov., Dec.

I was born on Nov. 6, 1980. The new schools venture fund is a san francisco-based philanthropy that focuses on accelerating the growth of a nonprofit charter school system