<unk>  is a medical term for abnormally shallow breathing or slow respiratory rate. This differs from apnea in that there remains some flow of air.<unk>  comes from the Greek roots hypo- (meaning low, under, beneath, down, below normal) and pnoe (meaning breathing). Literally it means underbreathing.
Hypopnea
Apnea
Bradypnea
Hypernea
Labored breathing
Tachypnea
Normotension
Platypnea