| anniversary |
the date each year that is the same date on which a wedding or other important event happened. [1/2 definitions] |
| announcer |
a person who presents programs or reads advertisements on radio or television. |
| annual ring |
one of the rings of wood on the inside of a tree that can be seen when the tree is cut into logs. Each ring represents a year of growth. |
| ant |
an insect that lives in large, organized groups called colonies. Most kinds of ants live in or on the ground. Ants are related to bees and wasps. |
| antenna |
one of a pair of long, thin body parts on the head of insects, crabs, and other animals. Antennae are used to feel and smell. [1/2 definitions] |
| antler |
one of a pair of bony growths on the head of most kinds of deer. Male elk, moose, and white-tailed deer all grow antlers with branches or prongs. Deer grow new antlers every year. Caribou and reindeer are the only deer that have antlers on both the males and the females. |
| anvil |
a heavy metal block with a flat top on which heated metal objects are hammered into shapes. |
| aperture |
an opening that controls the amount of light that reaches the lens on a camera. [1/2 definitions] |
| appendix |
a short, closed tube of tissue that grows out of the large intestine. The appendix is on the right side of the lower abdomen. [1/2 definitions] |
| apple |
the tree on which this fruit grows. [1/2 definitions] |
| application |
the act of putting something on. [1/4 definitions] |
| apply |
to lay on. [1/5 definitions] |
| appoint |
to set or decide on. [1/2 definitions] |
| approach |
to begin to work on; prepare to do. [1/6 definitions] |
| April Fools' Day |
the first day of April, when friendly tricks and jokes are played on people. |
| aquatic |
of or taking place on the water. [2 definitions] |
| Arabian Peninsula |
a peninsula in the Middle East on which lie the countries of Saudi Arabia, Yemen, Oman, United Arab Emirates, Qatar, Bahrain, and Kuwait. The peninsula lies between the Red Sea to the west and the Persian Gulf to the northeast. The Indian Ocean borders the peninsula on the southeast. |
| arbor1 |
a shady area made by arranging trees and bushes or by growing vines on a frame. |
| ark |
in the Bible, a chest carried by the ancient Hebrews. The ark contained the two stone tablets on which the Ten Commandments were written. [1/2 definitions] |
| armor |
a covering placed on ships and vehicles that protects against weapons. [2/4 definitions] |
| army |
a large group of soldiers trained to use weapons to fight on land. [1/3 definitions] |