- Prostrate Stone Animals with Double Tails from Mausoleums of Xibeigang
- prosuspensor
- prosuspensor tier
- protable hardness tester
- protactinium
- protactinium-231
- protactinium-233
- protagonist
- Protagoras
- protamine
- protandry
- protanope
- protanopia
- protaxis
- protea family
- Protea flower
- protease
- protease cleavage sites prediction
- protease inhibitor
- protease; proteinase
- proteasome
- protectant
- protect areas land ownership
- protected area
- Protected area and National Park of New Zealand