- An abnormally high concentration of carbon dioxide in the blood, usually caused by acute respiratory failure from conditions such as asthma and obstructive pulmonary disease. It can lead to seizures and death if acute and untreated.
- Carbon dioxide poisoning due to abnormally high concentrations of carbon dioxide in an organism's environment.
Origin of hypercapniahyper– + Greek kapnos, smoke + –ia2.
- (medicine) the condition of having an abnormally high concentration of carbon dioxide in the blood
From hyper- +"Ž -capnia.