| accelerator |
a mechanical device that controls the speed of something, especially the gas pedal of a car. |
| aerosol |
liquid or solid particles suspended in a gas. [1/2 definitions] |
| airship |
an aircraft that is lighter than air and can be steered. An airship has an engine and is filled with gas. |
| ammonia |
the gas with a strong smell that is formed by combining nitrogen and hydrogen. Ammonia is used to make refrigerators cold and in making fertilizers. [2 definitions] |
| anesthetist |
a person, usually a doctor or nurse, trained to give gas or drugs that cause lack of sensation or loss of consciousness. |
| 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] |
| bead |
any small, round object, such as a drop of liquid or a gas bubble. [1/3 definitions] |
| belch |
to release gas from the stomach through the mouth in a noisy burst; burp. [1/3 definitions] |
| blimp |
an aircraft that holds its shape and flies because it is filled with a gas that is lighter than air; dirigible. |
| blow up |
to fill with air or gas. [1/3 definitions] |
| bubble |
a small, round volume of gas surrounded by a liquid or a solid. [2/4 definitions] |
| 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. |
| buoyancy |
the capacity to float or rise to the top in a liquid or gas. |
| burp |
(informal) the act of letting gas out from the mouth in a loud manner; belch. [3 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. |
| chlorine |
a substance that is one of the chemical elements. It combines with sodium to form table salt. It is also used in making bleach. Chlorine is poisonous in its pure gas form. (symbol: Cl) |
| cock1 |
a device like a faucet used to control the flow of a liquid or gas. [1/3 definitions] |
| comet |
an object in space that travels around the sun. A comet is made up of dust and gas, and sometimes forms a long, bright tail. |
| condensation |
the act or process of changing from a gas to a liquid. [1/2 definitions] |
| condense |
to cause to change from a gas to a liquid or solid through cooling. [2/4 definitions] |