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The Collaborative International Dictionary
Exhalation

Exhalation \Ex`ha*la"tion\, n. [L. exhalatio: cf. F. exhalaison, exhalation.]

  1. The act or process of exhaling, or sending forth in the form of steam or vapor; evaporation.

  2. That which is exhaled, or which rises in the form of vapor, fume, or steam; effluvium; emanation; as, exhalations from the earth or flowers, decaying matter, etc.

    Ye mists and exhalations, that now rise From hill or steaming lake.
    --Milton.

  3. A bright phenomenon; a meteor. [archaic]

    I shall fall Like a bright exhalation in the evening.
    --Shak.

Douglas Harper's Etymology Dictionary
exhalation

late 14c., "act of exhalation; that which is exhaled," from Latin exhalationem (nominative exhalatio) "an exhalation, vapor," noun of action from past participle stem of exhalare "to breathe out" (see exhale).

Wiktionary
exhalation

n. 1 The act or process of exhale, or sending forth in the form of steam or vapor; evaporation. 2 That which is exhaled, or which rises in the form of vapor, fume, or steam; effluvium; emanation; as, exhalations from the earth or flowers, decaying matter, etc. 3 A bright phenomenon; a meteor.

WordNet
exhalation
  1. n. exhaled breath [syn: halitus]

  2. the act of expelling air from the lungs [syn: expiration, breathing out]

Wikipedia
Exhalation

Exhalation (or expiration) is the flow of the respiratory current out of the organism. In humans it is the movement of air out of the bronchial tubes, through the airways, to the external environment during breathing.

This happens due to elastic properties of the lungs, as well as the internal intercostal muscles which lower the rib cage and decrease thoracic volume. As the thoracic diaphragm relaxes during exhalation it causes the tissue it has depressed to rise superiorly and put pressure on the lungs to expel the air. During forced exhalation, as when blowing out a candle, expiratory muscles including the abdominal muscles and internal intercostal muscles generate abdominal and thoracic pressure, which forces air out of the lungs.

Exhaled air is rich in carbon dioxide, a waste product of cellular respiration during the production of energy, which is stored as ATP. Exhalation has a complementary relationship to inhalation; the cycling between these two efforts define respiration.

Exhalation (short story)

"Exhalation" is a science fiction short story by Ted Chiang. It was first published in 2008 in the anthology Eclipse 2: New Science Fiction and Fantas, edited by Jonathan Strahan. It won the 2009 Hugo Award for Best Short Story.

Usage examples of "exhalation".

Bits of bone alveolar fragments, as he explained, between two of his exhalations flew out.

The hills moved slowly, filling the evening air with explosive hisses and puffs, the exhalations of a colossal cetacean calliope.

A piece was eaten each night and morning for asthmatical complaints, whilst it was customary when travelling by a river to suck a bit of the root against poisonous exhalations and bad air.

We did not dare to go ashore, not knowing if we should find dry ground to camp on, and greatly fearing the poisonous exhalations from the marsh, from which we thought we should be freer on the water.

Haynes had postulated that the dune seas of this world had tides and movements, exhalations and fumaroles that hinted at mysteries far beneath the surface.

The air was pungent with undeath, the gelid exhalation of dying ice, filled with something like loss.

Besides, she has other chapters on nervous affections, on icterus, on fevers, on intestinal worms, on infections due to swamp exhalations, on dysentery, and a number of forms of pulmonary diseases.

A moment later, however, the lovers started up again with a rustling of sheets, an exchange of soft endearments, with sweet exhalations and profound sighs, all signaling, he assumed, a shift in position, a pianissimo movement in their lustful symphony.

It is contained in the pustules, and in the excretions and exhalations of affected individuals.

If they follow our protocol, it will be anaerobic life at first, then photosynthesis and the first exhalation of oxygen, then respiring life and the great burst of variation, then speciation, and, finally, some kind of consciousness.

They were simply the last traces left by the torrent which had so long thundered through this cavity, and the air there was pure though slightly damp, but producing no mephitic exhalation.

The exhalation of a trillion budding exotherms melted the ice above the little vehicle.

He committed the wild imprudence of traversing the Maremma in August, and was killed by the poisonous exhalations.

Great sea mammal sounds began to issue from them both: a groaning against the heavy pressure of the ocean, a squirty opening of mollusk shells, a slapping of wet flippers, an exhalation of salty and humid vapors, a blubberous explosion of moby dick.

Beside the Thames the stink of the silt mixed with the sweeter exhalations of the molasses, sugar and rum in the jumble of decrepit storehouses and manufactories that pressed up from the quays, together with the acrid tangs of the sea-wrack and snails exposed by the ebbing tide.