β-酮丁酸，乙酰乙酸：同acetoacetic acid- pyrophobia
- pyrophosphatase
- pyrophosphate
- pyrophosphokinase
- pyrophosphoric acid
- pyrophosphotransferase
- Pyroplasma
- pyropuncture
- pyroscope
- pyrosis
- Pyrosoma
- pyrotic
- pyrotoxin
- pyrovalerone hydrochloride
- pyroxamine maleate
- pyroxylin
- pyrrobutamine phosphate
- pyrrocaine
- pyrroetioporphyrin
- pyrrole
- pyrrolidine
- pyrroline
- pyrroline-5-carboxylate reductase
- pyrrolnitrin
- pyrroloporphyria