Noun

• S: (n) respiration, internal respiration, cellular respiration (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)
• S: (n) respiration (a single complete act of breathing in and out) "thirty respirations per minute"
• S: (n) breathing, external respiration, respiration, ventilation (the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation)