hypercapnia
noun
hy·per·cap·nia ˌhī-pər-ˈkap-nē-ə 
: the presence of excessive amounts of carbon dioxide in the blood
hypercapnic
ˌhī-pər-ˈkap-nik
adjective 
Word History
Etymology
New Latin, from hyper- + Greek kapnos smoke; probably akin to Lithuanian kvapas breath
First Known Use
1908, in the meaning defined above
Medical Definition
hypercapnia
noun
hy·per·cap·nia -ˈkap-nē-ə
: the presence of an excess of carbon dioxide in the blood