\Hy`per*n[oe]"a\, n. [NL., fr. Gr. "ype`r over + ?, ?,
breath.] (Physiol.)
Abnormal breathing, due to slightly deficient arterialization
of the blood; -- in distinction from eupn[oe]a. See
{Eupn[oe]a}, and {Dispn[oe]a}.