| anthracite |
a hard, shiny coal that burns with little flame or smoke. |
| anthrax |
an infectious, often fatal disease. Anthrax usually infects sheep or cattle, but can infect humans as well. |
| anthropology |
the scientific study of humankind. People who study anthropology learn about the origins and development of human beings and their societies and customs. |
| anti- |
a prefix that means "against" or "opposed to." [2 definitions] |
| antibiotic |
substance derived from fungi or other organisms and used to destroy or prevent the growth of bacteria or other disease-causing organisms. |
| antibody |
a protein in blood that reacts to particular toxic substances by neutralizing or destroying them. Antibodies provide immunity against these toxic substances. |
| anticipate |
to look forward to; expect. [2 definitions] |
| anticipation |
the act or process of anticipating. [2 definitions] |
| antidote |
a substance that stops poison from working or cures a disease. |
| antifreeze |
a substance that lowers the freezing point of a liquid such as water. |
| Antigua and Barbuda |
a country in the Caribbean Sea made up of three islands. The capital of Antigua and Barbuda is St. John's. |
| antique |
from or made in a time long ago. [2 definitions] |
| antiseptic |
a substance or drug that kills germs that cause disease or decay. |
| antitoxin |
an antibody formed in the body to act against a specific poison. |
| 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. |
| antonym |
a word that has the opposite meaning of another word. |
| anvil |
a heavy metal block with a flat top on which heated metal objects are hammered into shapes. |
| anxiety |
a feeling of being worried, nervous, or afraid that something will happen. |
| anxious |
feeling worried, nervous, or afraid about something uncertain. [2 definitions] |
| any |
one or some, no matter which or how many. [5 definitions] |
| anybody |
any person; anyone. |