external respiration is a noun meaning "the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation". It carries one recorded sense.
the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation
Definitions, synonyms and semantic relations for external respiration come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.