A period of immeasurable duration. See Eon.

An immeasurable or infinite space of time; eternity; a long space of time; an age.

Eternal; everlasting; lasting for an indefinitely long time; immortal; not subject to death. Opposite of mortal.

African antelopes: impalas.

coextensive with the order Aepyorniformes.

huge extinct flightless birds: elephant birds.

A gigantic (to 9 ft.) extinct flightless bird, of which fossils were found in Madagascar.

To combine or charge with gas; usually with carbonic acid gas, formerly called fixed air.

treated by having air passed or bubbled through it for purification; -- of a liquid

Exposure to the free action of the air; airing; as, a/ration of soil, of spawn, etc.

That which supplies with air or gas An apparatus used for charging mineral waters with gas and in making soda water. A fumigator used to bleach grain, destroying fungi and insects.

A secondary respiratory tissue or modified periderm, found in many aquatic plants and distinguished by the large intercellular spaces.

a pass to a receiver downfield from the passer.

Of or pertaining to the air, or atmosphere; inhabiting or frequenting the air; produced by or found in the air; performed in the air; as, a/rial regions or currents; the a/rial maneuvers of a fighter plane.

an athlete who performs acts high above the ground on a trapeze or high wire, requiring skill and agility and coordination.

any orchid of the genus Aerides.

The nest of a bird of prey, as of an eagle or hawk; also a brood of such birds; eyrie. Shak. Also fig.: A human residence or resting place perched like an eagle's nest.

of or pertaining to aeronautics or aircraft.

an organism such as a microorganism that requires oxygen for life or growth.

physical exercises performed in a sustained and strenuous fashion designed to cause a temporary increase in respiration rate and heart rate, such a running, swimming, walking, or calisthenics. Calisthenic sessions in groups, performed by following a leader in moving to a rhythmic musical accompaniment, are a popular form of aerobics.

the resistance caused by a gas to the motion of a solid body moving through it. Studied in aerodynamics.

The science which treats of the air and other gaseous bodies under the action of force, and of their mechanical effects.

a heavier-than-air aircraft; same as aeroplane. Contrasted with aerostat.

A plane or arched surface for sustaining bodies by its movement through the air; a spread wing, as of a bird.

The science which treats of the properties of the air, and of the part it plays in nature.

One versed in a/ography: an a/rologist.

Pertaining to a/rography; a/rological.

A description of the air or atmosphere; a/rology.

A cannon capable of being trained at very high angles for use against aircraft. Now usually referred to an anitaircraft cannon.

Acting by the force of air and water; as, an a/rohydrodynamic wheel.

A stone, or metallic mass, which has fallen to the earth from distant space; a meteorite; a meteoric stone.

Same as A/rolite.

The science of a/rolites.

Of or pertaining to a/rolites; meteoric; as, a/rolitic iron.

Of or pertaining to a/rology.

One versed in a/rology.

That department of physics which treats of the atmosphere.

Divination from the state of the air or from atmospheric substances; also, forecasting changes in the weather.

A mechanic or mechanician expert in the art and practice of a/ronautics.

Of or pert. to a/romechanics.

The science of equilibrium and motion of air or an a/riform fluid, including a/rodynamics and a/rostatics.

An instrument for ascertaining the weight or density of air and gases.

Of or pertaining to a/rometry; as, a/rometric investigations.

The science of measuring the air, including the doctrine of its pressure, elasticity, rarefaction, and condensation; pneumatics.

A dirigible balloon.

An a/rial navigator; a balloonist.

Pertaining to a/ronautics, or a/rial sailing.

The science or art of ascending and sailing in the air, as by means of a balloon; a/rial navigation; ballooning.

A power-driven, heavier-than-air flying machine. Now called airplane.

Dread of a current of air or of fresh air.

A form of combined speaking and ear trumpet. An instrument, proposed by Edison, for greatly intensifying speech. It consists of a phonograph diaphragm so arranged that its action opens and closes valves, producing synchronous air blasts sufficient to operate a larger diaphragm with greater amplitude of vibration.

A plant growing entirely in the air, and receiving its nourishment from it; an air plant or epiphyte.

A light rigid plane used in a/rial navigation to oppose sudden upward or downward movement in the air, as in gliding machines; specif., such a plane slightly inclined and driven forward as a lifting device in some flying machines. Also called airfoil.

One who flies in an a/roplane.

An apparatus designed for collecting spores, germs, bacteria, etc., suspended in the air.

The observation of the state and variations of the atmosphere.

Of the nature of, or like, copper; brassy.

A mass of meteoric iron.

of or pertaining to aerospace in either sense.

The atmosphere.

Of or pertaining to a/rostatics; pneumatic.

The science that treats of the equilibrium of elastic fluids, or that of bodies sustained in them. Hence it includes a/ronautics.

That part of a/ronautics that deals with passive balloons; the art of raising and guiding balloons in the air.

The positive or negative stimulus exerted by oxygen on a/robic and ana/robic bacteria.

Treatment of disease by the use of air or other gases.

A form of hydro-a/roplane; a flying boat.

a trademark for a loosely woven cotton fabric that is used to make shirts and underwear.

Of the nature or color of verdigris, or the rust of copper.

The rust of any metal, esp. of brass or copper; verdigris.

A/rial; ethereal; incorporeal; visionary.

Pertaining to /sculapius or to the healing art; medical; medicinal.

The god of medicine. Hence, a physician.

Same as Esculin.

In the old Norse mythology, the gods Odin, Thor, Loki, Balder, Frigg, and the others. Their home was called Asgard.

Of or pertaining to /sop, or in his manner.

Perception by the senses; feeling; -- the opposite of an/sthesia.

Sensuous perception.

Conveying sensory or afferent impulses; -- said of nerves.

One who makes much or overmuch of /sthetics.

Of or Pertaining to /sthetics; versed in /sthetics; as, /sthetic studies, emotions, ideas, persons, etc.

One versed in /sthetics.

The doctrine of /sthetics; /sthetic principles; devotion to the beautiful in nature and art.

The science of sensation in relation to nervous action.

Of or belonging to the summer; as, /stival diseases.

To spend the summer.

The state of torpidity induced by the heat and dryness of summer, as in certain snails; -- opposed to hibernation.

See Estuary.

Glowing; agitated, as with heat.

Propagated in an unusual way; cryptogamous.

See Ether.

A compound of nitrogen and boro/, which, when heated before the blowpipe, gives a brilliant phosphorescent; boric nitride.

An instrument consisting in part of a differential thermometer. It is used for measuring changes of temperature produced by different conditions of the sky, as when clear or clouded.

Pertaining to /tiology; pertaining to the cause; assigning a cause.

The science, doctrine, or demonstration of causes; esp., the investigation of the causes of any disease; the science of the origin and development of things; etiology.

See Eaglestone.

At, to, or from a great distance; far away; -- often used with from preceding, or off following; as, he was seen from afar; I saw him afar off.

Afraid.

The southwest wind.

The quality of being affable; readiness to converse; courteousness in receiving others and in conversation; complaisant behavior.

Easy to be spoken to or addressed; receiving others kindly and conversing with them in a free and friendly manner; courteous; sociable.

Affability.

In an affable manner; courteously.

Executed in a workmanlike manner; ingeniously made.

That which is done or is to be done; matter; concern; as, a difficult affair to manage; business of any kind, commercial, professional, or public; -- often in the plural. /At the head of affairs./ Junius.

To afflict with, or perish from, hunger.

Starvation.

To infatuate.

To frighten.

Affection; inclination; passion; feeling; disposition.

An attempt to assume or exhibit what is not natural or real; false display; artificial show.

One who exhibits affectation.

Regarded with affection; beloved.

In an affected manner; hypocritically; with more show than reality.

Affectation.

One who affects, assumes, pretends, or strives after.

The quality or state of being affectible.

That may be affected.

Moving the emotions; fitted to excite the emotions; pathetic; touching; as, an affecting address; an affecting sight.

In an affecting manner; is a manner to excite emotions.

The act of affecting or acting upon; the state of being affected.