Pap n. : A nipple; a mammilla; a teat.

Pap n. : A rounded, nipplelike hill or peak; anything resembling a nipple in shape; a mamelon.

Pap n. : A soft food for infants, made of bread boiled or softtened in milk or water.

Pap n. : Nourishment or support from official patronage; as, treasury pap.

Pap n. : The pulp of fruit.

Pap v. t. : To feed with pap.

Example:
How do I get through a Pap smear without getting tense?

Taxonomy
PAP, pressure, CPAP, patients, sleep, treatment, ventilation, Positive airway pressure, the mask, hose, lung, face mask, sleep apnea, CPAP machine, therapy, breath, IPAP, masks.

Defination from the web:
PAP) is a method of respiratory ventilation used primarily in the treatment of sleep apnea, for which it was first developed. ... In these patients, PAP ventilation can prevent the need for endotracheal intubation, or allow earlier extubation. ...