| A/C |
abbreviation of "air conditioning," a system that circulates cooled and dehumidified air in a building, car, or other space. |
| accordion |
a musical instrument with a keyboard that is small enough to carry. An accordion is played by pressing the keys and squeezing the bellows to force air through metal reeds. |
| aerate |
to expose to the circulation or chemical action of air in order to ventilate or cleanse. [1/3 definitions] |
| aerator |
a device that aerates a fluid or mixes it with air. |
| aerial |
of or happening in the air or atmosphere. [4/3 definitions] |
| aero- |
air or atmosphere. [1/3 definitions] |
| aerodynamic |
having a smooth, even shape that offers the least possible resistance to air currents or movement. |
| aerodynamics |
(used with a sing. verb) a science that deals with the dynamics of air and other gases and with the forces acting on objects that move through them. |
| aeroembolism |
nitrogen or air bubbles in the bloodstream, caused by severe decompression, surgery, or injury, and resulting in severe pain and sometimes convulsions; bends; decompression sickness; caisson disease. |
| aeromechanics |
(used with a sing. verb) the science of air or gases in motion or equilibrium. |
| aerostat |
an aircraft, such as a balloon or dirigible, that is lifted and held aloft by a gas that is lighter than air. |
| air |
the mixture of gases that is in the space around the earth. People need air to live. |
| air bag |
a bag in the front of some cars that blows up with air instantly in a crash to stop the passengers from being thrown forward. |
| air base |
a military base for air force operations. |
| air bladder |
an air-filled sac in various animals and plants, esp. such a structure located near the spine of certain fish that functions to maintain buoyancy by regulating hydrostatic pressure. (See swim bladder.) |
| airborne |
borne or carried in the air. [2 definitions] |
| airbrake |
a brake or brake system operated by the force of compressed air against a piston. |
| air chamber |
a compartment in which air is confined for a special use, as in a pump, a hydraulic fluid regulator, or a living organism. |
| air command |
a major unit in a military air force, esp. in the United States. |
| air-condition |
to furnish with air conditioning. |
| air conditioner |
a machine that cools the air in a room or car. An air conditioner also takes the dust and dampness out of the air. |