- positional parameter
- positional system
- possessing many virtues
- periodic paralysis
- piddock
- pleven
- partial thromobo_plastin time
- potain aspirating set
- pagenstechers linen
- prelasyngeal lymph node
- prototrophy
- placenta succenturiata
- placenta placenta marginalis
- porphobiliongen
- pkd
- pseudopod
- pachyderma lymphangiectatica
- pachyglossia
- ponderosa pine
- packet mode operation
- pleasure_pain principle
- page addressing
- pedomorphic race
- page heading
- page key
- page pool
- page reader
- page control
- page depth control
- printer's devil
- paul mccartney
- pleural shock
- pain_producing agent
- phylum porifera
- pustular syphilide
- pyelovenous
- pylorospasm
- pyloric obstruction
- pyloroscopy
- positive reinforcer
- positive reinforcing stimulus
- pentosuria
- patristical
- partial differential equation
- precedented
- pertaining to the cross
- prenominal
- possessing matching strength
- pier glass
- primary pulmonary lympho_sarcoma