| arithmetic |
the method and process of using whole numbers to add, subtract, multiply, and divide. |
| Arizona |
a state in the southwestern United States. Its capital is Phoenix. (abbreviated: AZ) |
| ark |
(sometimes capitalized) in the Bible, the large boat built by Noah to save his family and two of every animal from a flood sent by God. [2 definitions] |
| Arkansas |
a state in the south central United States. Its capital is Little Rock. (abbreviated: AR) |
| arm1 |
the part of the human body between the shoulder and the wrist. [2 definitions] |
| arm2 |
(usually plural) weapons. Guns, knives, and bombs are arms. [3 definitions] |
| armada |
a large group of ships armed for battle. |
| armadillo |
a mammal whose body is protected by hard, bony plates. Armadillos live in Central and South America, and the southern United States. Some kinds of armadillos are only six inches long; other kinds grow up to four feet in length. They eat mostly insects and are related to sloths and anteaters. |
| armament |
(usually plural) the total military power of a country, including weapons and supplies. |
| armchair |
a chair having supports at the sides for resting one's arms. |
| armed forces |
all the military services of a country. |
| Armenia |
a country in southwestern Asia. Yerevan is the capital of Armenia. |
| armistice |
an agreement by groups of people or countries at war to stop fighting; truce. |
| armor |
a suit made of leather, metal, or other strong material, worn to protect the body during battle. [4 definitions] |
| armored |
wearing or being covered by armor. |
| armory |
a place where weapons and other military equipment are made or stored. |
| armour |
a spelling of "armor" used in Canada and Britain. See "armor" for more information. |
| armoury |
a spelling of "armory" used in Canada and Britain. See "armory" for more information. |
| armpit |
the hollow formed beneath the arm at the shoulder. |
| army |
a large group of soldiers trained to use weapons to fight on land. [3 definitions] |
| aroma |
a pleasant smell; fragrance. |