Webster's Revised Unabridged Dictionary · 1913

Respiratory

Respiratory (r?*sp?r"?*t?*r? o r?s"p?*r?-) , adjective

(Physiology) Of or pertaining to respiration; serving for respiration; as, the respiratory organs; respiratory nerves; the respiratory function; respiratory changes.
Collocations (2)
Respiratory foods (Physiology) , See 2d Note under Food, n., 1.
Respiratory tree (Zoology) , the branched internal gill of certain holothurians.