- postural hypotesion
- postural drainage
- parathyroid hormone
- parathormone
- protirelin
- panhypopituitary dwarfism
- psychoneurotic anxiety state
- prolepsis
- paralepsis
- paregmenon
- polysyndeton
- paraleipsis
- plexus hypogastricus
- prognathic
- prognathous
- portland cement
- pH
- pH scale
- planula
- pistia
- Pistia stratoites
- Pistia stratiotes
- Proteles cristata
- pismire
- psychrometer
- polydactyly
- polyhidrosis
- pine_weed
- pineweed
- presbyopia
- plural
- peptide
- proteolytic activity
- preponderance
- prosopopoeia
- pooh_bah
- physical surrender
- pelvic arch
- pelvic girdle
- pectoral girdle
- preposterous times
- passive
- plant hopper
- pleistocene
- pleistocene epoch
- polar body
- peach blight
- parfait
- Piedmont type of glacier
- pogonophora