Exhalation (noun)

1. The act of exhaling, especially the release of air or breath from the lungs through the mouth or nose.
2. A substance or vapor expelled from the lungs, such as air, carbon dioxide, or other gases.
3. The release of a gas, such as carbon dioxide, from a plant, animal, or organism.
4. The emission of a substance from a volcanic vent or a geyser.

Origin:

From late latin exhalationem, from exhalare ("to exhale"), from ex- ("out") + halare ("to breathe").

Examples:

1. The exhalation of the dragon caused a great gust of wind.
2. The exhalation of the runner was labored and heavy.
3. The exhalation of the whale was a powerful blast of water.
4. The exhalation of the volcano was a cloud of ash and gas.
5. The exhalation of the plant provided a source of oxygen for animals.