polymnia - premenarchal
- positive heteropyknosis
- positive hydrotropism
- positive induction
- positive inotropic activity
- positive inotropic agent
- positive inotropic effect
- positive mental symptom
- positive node cancer
- positive pressure
- positive pressure impression
- positive reaction
- positive reinforcement
- positive scintigram
- positive scotoma
- positive stimulus
- positive take
- positive venous pulse
- positive wave
- positive-feedback
- positive-feedback cycle
- positive-negative
- positive-negative pressure breath
- positrocephalogram
- positron
- positron annihilation photon
- positron camera
- positron emission tomograph
- positron scan
- positron tomography
- positron-emitting radionuclide
- Posner-Schlossmann syndrome
- posologic
- posological plate
- posology
- posset
- posseting
- possibility of cure
- possum
- post
- post crown