| balloon |
a large bag made of thin material designed to inflate and be lifted off the ground when filled with hot air or a gas that is lighter than air. [2/3 definitions] |
| beach ball |
a large, air-filled ball of brightly colored plastic, usually used for games played in or near the water. |
| bellows |
(used with a singular or plural verb) a bag that can be expanded to draw air in and squeezed to force air out. Bellows are used to blow air on a fire or produce sound on a musical instrument. |
| blimp |
an aircraft that holds its shape and flies because it is filled with a gas that is lighter than air; dirigible. |
| bloat |
to make swollen or too full of air, water, or food. |
| blow2 |
to force air out of the mouth. [4/7 definitions] |
| blowhole |
a vent to let out air or gases. [1/3 definitions] |
| blow up |
to fill with air or gas. [1/3 definitions] |
| breath |
the air that flows into and out of the lungs during breathing. [3 definitions] |
| breathe |
to draw air into the lungs and let it out. [1/2 definitions] |
| breathing |
the act or process of inhaling and exhaling air. |
| Bunsen burner |
a burner that has holes at the bottom where air enters, mixes with gas, and makes a hot blue flame. Bunsen burners are used in laboratory experiments. |
| cable |
a form of television in which the sound and picture signals are sent by cable rather than through the air; cable television. [1/5 definitions] |
| canal |
a part of an animal or plant body that is like a tube. Some canals carry air, and others carry liquids. [1/2 definitions] |
| canopy |
something high in the air or sky that is spread out over the earth. The top layer of branches and leaves in a rainforest, for example, is called a canopy. [1/2 definitions] |
| captain |
an officer of the U.S. Army, Air Force, or Marines, holding the rank just below major. [1/7 definitions] |
| carbon dioxide |
a gas without color or odor that is made up of carbon and oxygen. Carbon dioxide is in the air and is used in soft drinks. Frozen carbon dioxide is called dry ice. |
| carbon monoxide |
a poisonous gas with no color or smell. Carbon monoxide forms when a material made of carbon, like gasoline, is not fully burned because of too little air. |
| carburetor |
the part of an engine that makes a mixture of air and gasoline that is burned by the engine when it runs. |
| cast |
in fishing, to throw out into the air. [1/12 definitions] |
| caulk |
to fill in cracks with putty or tar to keep air or water from leaking through. |