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or process of breathing out, or forcing air from the lungs through the nose or mouth; as, respiration consists of inspiration and expiration; -- opposed to Ant: inspiration.

he out; to emit from the lungs; to throw out from the mouth or nostrils in the process of respiration; -- opposed to inspire. Anatomy exhibits the lungs in a continual motion of inspiring and expiring air. Harvey. This chafed the boar; his nostrils flames expire. Dryden.

owing to a sudden arrest of the blood supply to the brain, the face becoming pallid, the respiration feeble, and the heat's beat weak. Fainting fit, a fainting or swoon; syncope. [Colloq.]

To open the mouth wide in catching the breath, or in laborious respiration; to labor for breath; to respire convulsively; to pant violently. She gasps and struggles hard for life. Lloyd.

An organ for aquatic respiration; a branchia. Fishes perform respiration under water by the gills. Ray.

The transformation of venous arterial blood by respiration; hematosis.

ween the ribs; pertaining to, or produced by, the parts between the ribs; as, intercostal respiration, in which the chest is alternately enlarged and contracted by the intercostal muscles.

Unfit for respiration; not having the qualities necessary to support animal life; as, irrespirable air.

The operation of cutting into the larynx, from the outside of the neck, for assisting respiration when obstructed, or for removing foreign bodies.

An organ for aërial respiration; -- commonly in the plural. My lungs began to crow like chanticleer. Shak.

and pons, and from it a large part of the cranial nerves arise. It controls very largely respiration, circulation, swallowing, and other functions, and is the most vital part of the brain; -- called also bulb of the spinal cord. See Brain.

Specifically, a morbid condition in which respiration can be performed only in an erect posture; by extension, any difficulty of breathing.

The olfactory organ of some Mollusca. It is connected with the organ of respiration.

An instrument for registering the movements of the diaphragm, or midriff, in respiration.

ranch which more or less resembles a leaf, and performs the function of a leaf as regards respiration and assimilation.

An inflammation of the pleura, usually accompanied with fever, pain, difficult respiration, and cough, and with exudation into the pleural cavity. Pleurisy root. (Bot.) (a) The large tuberous root of a kind of milkweed (Asclepias tuberosa) which is used as a remedy for pleuritic and other diseases. (b) The plant itself…

A combining form from Gr. wind, air, breath, respiration; as, pneumatograph, pneumatology.

An instrument for recording the movements of the thorax or chest wall during respiration; -- also called stethograph.

An instrument for measuring the amount of force exerted by the lungs in respiration.

An apparatus for producing artificial respiration by pumping oxygen or air or a mixture of the two into and out of the lungs, as of a person who has been asphyxiated by drowning, breathing poisonous gases, or the like, or of one who has been stunned by an electrical shock.