Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The action or process of inhaling and exhaling; breathing.
  • noun An act of inhaling and exhaling; a breath.
  • noun The action or process by which an organism without lungs, such as a fish or plant, exchanges gases with its environment.
  • noun The oxidative process occurring within living cells by which the chemical energy of organic molecules is converted in a series of metabolic steps into usable energy in the form of ATP, involving the consumption of oxygen and the production of carbon dioxide and water as byproducts.
  • noun Any of various analogous metabolic processes by which certain organisms, such as anaerobic bacteria and some fungi, obtain energy from organic molecules without consuming oxygen.

from The Century Dictionary.

  • noun The act of breathing again or resuming life.
  • noun The inspiration and expiration of air.
  • noun 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.
  • noun 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.
  • noun The respiratory murmur.
  • noun A breathing-spell; an interval.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The act of respiring or breathing again, or catching one's breath.
  • noun obsolete Relief from toil or suffering: rest.
  • noun obsolete Interval; intermission.
  • noun (Physiol.) 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 Wiktionary, Creative Commons Attribution/Share-Alike License.

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

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

  • noun 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
  • noun the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation
  • noun a single complete act of breathing in and out

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Middle English respiracioun, from Latin respiratio, from respirare.

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

  • 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

  • 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?

  • 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

  • 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

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