| A.D. |
after the birth of Jesus Christ. A.D. is an abbreviation for anno domini, which means "in the year of the Lord" in Latin. Something that happened in A.D. 50 happened fifty years after the birth of Christ. |
| AK |
abbreviation of "Alaska." |
| AL |
abbreviation of "Alabama." |
| a.m. |
abbreviation of "ante meridiem," which means "before noon" in Latin; the time between midnight and noon. |
| amt. |
abbreviation of "amount." |
| Apr. |
abbreviation of "April." |
| apt. |
abbreviation of "apartment." |
| AR |
abbreviation of "Arkansas." |
| ASAP |
abbreviation of "as soon as possible." |
| ASPCA |
abbreviation of "American Society for the Prevention of Cruelty to Animals," a national organization whose purpose is to take care of lost or stray dogs, cats, and other small animals. This organization tries to find people to adopt these animals as pets. |
| ATM |
an abbreviation for automated teller machine, a computerized machine used for banking. |
| Aug. |
abbreviation of "August." |
| Ave. |
abbreviation of "Avenue." |
| AZ |
abbreviation of "Arizona." |
| B.A. |
a college degree earned after four years of study. "B.A". is an abbreviation of "Bachelor of Arts." |
| B and B |
abbreviation of "Bed and Breakfast"; a small inn. |
| B.C.1 |
abbreviation of "before Christ." These letters are placed after a date that is earlier than the birth of Christ. [2 definitions] |
| Blvd. |
abbreviation of "Boulevard." |
| B.S.1 |
a college degree earned in a science, such as biology or chemistry, after four years of study. "B.S." is an abbreviation of "Bachelor of Science." |
| bu. |
abbreviation of "bushel" or "bushels." |
| C1 |
abbreviation of "Celsius," or "Centigrade." |