- Eupnaea Eup*n[ae]"a, n. [NL., fr. gr. ? easy breathing; e'y^ well + ? to breathe.] (Physiol.) Normal breathing where arterialization of the blood is normal, in distinction from dyspn[ae]a, in which the blood is insufficiently arterialized. --Foster. [1913 Webster]
The Collaborative International Dictionary of English. 2000.