the act of inhaling; the drawing in of air (or other gases) as in breathing | 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 |
a medication to be taken by inhaling it | the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation |
| a single complete act of breathing in and out |