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Pronunciation:  `respu'reyshun

WordNet Dictionary
  1. [n]  the metabolic processes whereby certain organisms obtain energy from organic moelcules; 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
  2. [n]  the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation
  3. [n]  a single complete act of breathing in and out; "thirty respirations per minute"

RESPIRATION is a 11 letter word that starts with R.


 Synonyms: breathing, cellular respiration, external respiration, internal respiration, ventilation
 See Also: abdominal breathing, activity, artificial respiration, aspiration, bodily function, bodily process, body process, breathing in, breathing out, Cheyne-Stokes respiration, eupnea, eupnoea, exhalation, expiration, heaving, hyperpnea, hyperventilation, hypopnea, inhalation, inspiration, metabolic process, metabolism, metastasis, panting, periodic breathing, second wind, smoke, smoking, sniffle, snivel, snore, snoring, snuffle, stertor, wheeze



Webster's 1913 Dictionary
\Res`pi*ra"tion\ (r?s`p?*r?"sh?n), n. [L.
respiratio: cf. F. respiration. See {Respire}.]
1. The act of respiring or breathing again, or catching one's

2. Relief from toil or suffering: rest. [Obs.]

         Till the day Appear of respiration to the just And
         vengeance to the wicked.              --Milton.

3. Interval; intermission. [Obs.] --Bp. Hall.

4. (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.

Note: Respiration in the higher animals is divided into:
      ({a}) Internal respiration, or the interchange of
      oxygen and carbonic acid between the cells of the body
      and the bathing them, which in one sense is a process
      of nutrition. ({b}) External respiration, or the
      gaseous interchange taking place in the special
      respiratory organs, the lungs. This constitutes
      respiration proper. --Gamgee. In the respiration of
      plants oxygen is likewise absorbed and carbonic acid
      exhaled, but in the light this process is obscured by
      another process which goes on with more vigor, in which
      the plant inhales and absorbs carbonic acid and exhales
      free oxygen.

Medical Dictionary
 Definition: gas exchange from air to the blood and from the blood to the body cells.
Biology Dictionary
 Definition: A catabolic process that involves the exchange of oxygen and carbon dioxide between the body and the environment, the exchange of those gases within the body, and the oxidation of nutrient molecules for energy production.