Perception by means of the air, said to be a function of the antennae of insects.
1. An apparatus for gathering bacteria, dust, etc. from the air, for microscopic examination.
2. An instrument, usually electronic, used to count microscopic dust and other suspended matter in the air for purposes of analysis.
The differences in intensity of the light reflected from each facilitates the identification of the particles.
1. The measurement of the optical properties of air.
2. The examination of air for the presence of dust or other suspended matter.
Constant swallowing, thus taking saliva and air into the stomach; also sialoaerophagy.
aerosinusitis (s) (noun)
, aerosinusites (pl)
1. Inflammation of the paranasal sinuses caused by pressure difference within the sinus relative to ambient pressure, secondary to obstruction of the sinus orifice, sometimes due to high altitude flying or by descent from high altitude.
2. Sinus barotrauma affecting the occupants of aircraft during flight, particularly during descent, or soon after descent.
Barotrauma is trauma (serious or critical bodily injury, wound, or shock) caused by the rapid or extreme changes in air pressure; especially, affecting enclosed cavities within the body; such as, the middle ear (otic barotrauma), the sinuses (sinus barotrauma), and the lungs (pulmonary barotrauma).
The production of gas in the tissues or organs of the body.
1. Liquid or particulate matter dispersed in the air in the form of a fine mist for therapeutic, insecticidal, or other purposes.
2. A product that is packaged under pressure and contains therapeutically or chemically active ingredients intended for topical application, inhalation, or introduction into body orifices.
A liquefied gas that is used as the driving force to expel a liquid from a container; such as, an aerosol spray from a can; for example, hair spray, deodorants, spray paints, or various household cleaning products.
Dispersion in air of a liquid material or a solution in the form of a fine mist, usually for therapeutic purposes, especially to the respiratory passages.
The scientific study of aerosol (fine spray) therapy.
Hypothetical airborne bodies believed at one time to be present in tropical climates and which made acclimatization of Europeans to those areas difficult.
1. The earth's atmosphere and outer space.
2. The air surrounding the earth and the space beyond it.
3. Relating to the design, manufacture, and flight of vehicles or missiles that fly in and beyond the earth's atmosphere.
aerospace engineering (s) (noun)
, aerospace engineerings (pl)
The crafts or branches of sciences pertaining to the design and construction of aircraft and space vehicles and of power units, and dealing with the special problems of flight in both the earth's atmosphere and space; such as, in the flight of air vehicles and the launching, guidance, and control of missiles, earth satellites, and space vehicles and probes.
aerosphere (s) (noun)
, aerospheres (pl)
1. The area outside the air surrounding the earth where manned flight is possible: "The power of the rocket propelled it to the outer limits of the aerosphere."
2. The entire mass of gas surrounding the earth: "The aerosphere surrounding our planet is comprised of a variety of gases.
aerostat (s) (noun)
, aerostats (pl)
1. A lighter-than-air aircraft which sustains its height by the buoyancy of the surrounding air: Unpowered balloons, blimps, and dirigibles are examples of aerostats which use one or more containers filled with a lifting gas which keep them floating.
2. Any of a proposed system of satellites for use in air traffic control and maritime navigation: Observation aerostats are used by the military to watch the field of battle.
3. Etymology: from aero, [nautical] + sat [ellite].