hy·per·cap·ni·a (hī'pər-kāp'nē-ə) n. A condition marked by an unusually high concentration of carbon dioxide in the blood as a result of hypoventilation.
Main Entry: hy·per·cap·nia Pronunciation: -'kap-nE-& Function: noun : the presence of an excess of carbon dioxide in the blood —hy·per·cap·nic/-nik/adjective