breathing

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breathing:

see respirationrespiration,
process by which an organism exchanges gases with its environment. The term now refers to the overall process by which oxygen is abstracted from air and is transported to the cells for the oxidation of organic molecules while carbon dioxide (CO2
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.

breathing

[′brēth·iŋ]
(engineering)
Opening and closing of a plastics mold in orderto let gases escape during molding. Also known as degassing.
Movement of gas, vapors, or air in and out of a storage-tank vent line as a result of liquid expansions and contractions induced by temperature changes.
(materials)
Permeability of plastic sheeting to air, bubbles, voids, or trapped gas globules.
(physiology)
Inhaling and exhaling.
References in classic literature ?
The maids were still breathing, but more restlessly, and I fancied that the narcotic was wearing off.
And thus when Liza entered, holding Nana, the nursery seemed quite its old self, very dark, and you would have sworn you heard its three wicked inmates breathing angelically as they slept.
He strained his ears and heard Nikita breathing and even slightly snoring.
All this while the little fat musicker was breathing the notes:
Breathing is intermediate between the two: we normally breathe without the help of the will, but we can alter or stop our breathing if we choose.