Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The act or process of inhaling and exhaling; breathing. Also called ventilation.
  • n. The act or process by which an organism without lungs, such as a fish or plant, exchanges gases with its environment.
  • n. The oxidative process occurring within living cells by which the chemical energy of organic molecules is released in a series of metabolic steps involving the consumption of oxygen and the liberation of carbon dioxide and water.
  • n. Any of various analogous metabolic processes by which certain organisms, such as fungi and anaerobic bacteria, obtain energy from organic molecules.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The process of inhaling and exhaling; breathing, breath.
  • n. An act of breathing; a breath.
  • n. Any similar process, in organisms that lack lungs, that exchanges gases with its environment.
  • n. The process by which cells obtain chemical energy by the consumption of oxygen and the release of carbon dioxide.

from the GNU version of the Collaborative International Dictionary of English

  • n. The act of respiring or breathing again, or catching one's breath.
  • n. Relief from toil or suffering: rest.
  • n. Interval; intermission.
  • n. The act of resping or breathing; the act of taking in and giving out air; the aggregate of those processes bu which oxygen is introduced into the system, and carbon dioxide, or carbonic acid, removed.

from The Century Dictionary and Cyclopedia

  • n. The act of breathing again or resuming life.
  • n. The inspiration and expiration of air.
  • n. That function by which there takes place an absorption of oxygen from the surrounding medium into the blood with a corresponding excretion of carbon dioxid.
  • n. In physiological bot., a process consisting in the absorption by plants of oxygen from the air, the oxidation of assimilated products, and the release of carbon dioxid and watery vapor.
  • n. The respiratory murmur.
  • n. A breathing-spell; an interval.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the metabolic processes whereby certain organisms obtain energy from organic molecules; processes that take place in the cells and tissues during which energy is released and carbon dioxide is produced and absorbed by the blood to be transported to the lungs
  • n. the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation
  • n. a single complete act of breathing in and out

Etymologies

Middle English respiracioun, from Latin respiratio, from respirare. (Wiktionary)

Examples

  • The term respiration is frequently restricted to the mere inhalation and expiration of air from the lungs, but more generally it is employed to designate the whole series of phenomena which occur in these organs.

    Popular Education For the use of Parents and Teachers, and for Young Persons of Both Sexes

  • Even the girl's breathing was poorly acted, and that's the first time I have seen a failure in "respiration" acting.

    VOTD: Frame 137 Teaser Trailer | /Film

  • Given that most of the people they serve are elderly and home-bound with difficulty in respiration, it would be best to argue for the Medicaid in terms of humanity rather than its economic effect.

    The Volokh Conspiracy » Is Stimulus Funding Political?

  • Michel has later also crystallized and determined the structure of the terminal enzyme in respiration, and his two structures have allowed detailed studies of electron transfer (cf. Sections 3.3 and 3.4) and its coupling to proton pumping, key features of the chemiosmotic mechanism for which Peter Mitchell had already received the

    The Nobel Prize in Chemistry: The Development of Modern Chemistry

  • Early respiration is based on the assumption that stromatolites represent fossils of bacteria, instead of an artifact.

    A critique on the endosymbiotic theory for the origin of mitochondria

  • Because death results in what is called respiration or decay, dead bodies quickly convert back into their elements, thereby releasing large volumes of carbon dioxide and water.

    The Source

  • He found that, whereas the skin respiration was relatively constant, great variations occurred with regard to lung respiration.

    August Krogh - Biography

  • One knows that after violent exercise one breathes heavily for some time: the more violent the exercise, the longer one's respiration is laboured.

    Archibald V. Hill - Nobel Lecture

  • By cutting the nerve fibres which travel from the sinus to the medulla, it was demonstrated that the increase in respiration after inhalation of air of low oxygen content, did not occur at all, and that consequently the stimulating reaction depended entirely on the sinus reflex.

    Physiology or Medicine 1938 - Presentation Speech

  • I find them to act very soothingly in the simple asthma, facilitating respiration after a few minutes; but during the paroxysmal stage they cannot be utilized, for the reason that respiration is short and rapid, and does not permit of a control in the quantity of the gas to be inhaled.

    Scientific American Supplement, No. 795, March 28, 1891

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