arthritis |
a disease of the joints in which they swell and become painful. |
arthropod |
a large group of animals with hard shells on the outsides of their bodies, legs with joints, and no bones inside their bodies. Insects, spiders, centipedes, and crabs are arthropods. |
artichoke |
a plant like a tall thistle with a flower head made up of thick leaves. The head of the artichoke is eaten as a vegetable. |
article |
a single thing; one item out of a group of similar objects. [4 definitions] |
articulate |
able to speak or express oneself in a clear way. [2 definitions] |
articulated lorry |
a British word for a very large truck that consists of a cab where the driver sits and a trailer that carries goods over long distances. "Articulated lorry" often has the same meaning as "tractor-trailer." |
artifact |
any object made by human beings, especially one of an earlier era. |
artificial |
made by human beings; not natural. [2 definitions] |
artificial intelligence |
an area of computer science that explores the ability of computers to think or have intelligence. Artificial intelligence is concerned with developing computer programs or computers that seem to use reason and make decisions. |
artificial respiration |
the forcing of air into and out of the lungs of a person who has stopped breathing. |
artillery |
large weapons used in land battles, such as cannons or rockets. Artillery is too heavy for a person to carry and is sometimes mounted on wheels. [2 definitions] |
artisan |
a person skilled in making things, especially by using the hands. People such as those who make furniture, quilts, or other crafts are artisans. |
artist |
a person who is good at painting, music, writing, or any other art. [2 definitions] |
artistic |
having to do with art or artists. [2 definitions] |
art room |
a room in a school where art is taught and where art materials are kept. |
As |
symbol of the chemical element arsenic. |
as1 |
in equal measure; to the same extent. [7 definitions] |
ASAP |
abbreviation of "as soon as possible." |
asbestos |
a mineral that separates into fibers and does not catch fire or conduct electricity. Asbestos is used to make fireproof materials and insulation. |
ascend |
to go upward; climb; rise. [2 definitions] |
ascent |
the act of going up; climb; rise. [2 definitions] |