- Plasmodium yoelii
- Plasmolysis
- Plasmonic nanoparticles
- Plaster
- Plastic bronchitis
- Plasticity
- Plastics
- Plastids
- Plastin
- Plastisol
- Plastocyanin
- Plastoquinone
- Plateau phase
- Plateau potentials
- Plateau pressure
- Platelet
- Platelet activation
- Platelet count
- Platelet derived growth factor
- Platelet factor 4
- Platelet lysate
- Platelet plug
- Platelet storage pool deficiency
- Platelet transfusion
- Platelet transfusions
- Platelet-activating factor receptor
- Platelet-derived growth factor
- Platelet-derived growth factor receptor
- Platelet-derived growth factor receptor A
- Platelet-poor plasma
- Platelet-rich fibrin
- Platelet-rich fibrin matrix
- Platelet-rich plasma
- Plateletpheresis
- Platelets
- Platform switching
- Platform trials
- Platinum
- Platinum compounds
- Platinum nanoparticles
- Platinum-based antineoplastic
- Platybasia
- Platypnea
- Platypnea-orthodeoxia syndrome
- Platysma muscle
- Platyspondyly
- Plausibility
- Play therapy
- Playing God
- Plazomicin
- Plecanatide
- Pleckstrin
- Pleckstrin homology domain
- Pleconaril
- Plectasin
- Plegridy
- Pleiotropy
- Pleocytosis
- Pleomorphic T-cell lymphoma
- Pleomorphic adenoma
- Pleomorphic lipoma
- Pleomorphic xanthoastrocytoma
- Pleomorphism
- Plerixafor
- Plethysmograph
- Pleura
- Pleural cavity
- Pleural disease
- Pleural effusion
- Pleural empyema
- Pleural friction rub
- Pleural thickening
- Pleuran
- Pleurectomy
- Pleurisy
- Pleurocidin
- Pleurodesis
- Pleuromutilin
- Pleuron
- Pleuroperitoneal
- Pleuropneumonia
- Pleuropulmonary blastoma
- Plexin
- Plexopathy
- Plexus
- Plica semilunaris
- Plica syndrome
- Plinabulin
- Plitidepsin
- Plod1
- Ploidy
- Plosives
- Plucking
- Plum
- Plumbagin
- Plummer-Vinson syndrome
- Pluralistic ignorance
- Pluripotent
- Pluripotent stem cells
- Pluronic
- Plutonium
- Plutonium 239
- Plyometrics
- PncA
- Pneumatocele
- Pneumatosis
- Pneumatosis intestinalis
- Pneumobilia
- Pneumocandin B0
- Pneumocephalus
- Pneumococcal pneumonia
- Pneumococcal polysaccharide vaccine
- Pneumococcal vaccine
- Pneumoconiosis
- Pneumocystis carinii
- Pneumocystis carinii pneumonia
- Pneumocystis jirovecii
- Pneumocystis pneumonia
- Pneumocystosis
- Pneumoencephalography
- Pneumolysin
- Pneumomediastinum
- Pneumonectomy
- Pneumonia
- Pneumonia severity index
- Pneumonic plague
- Pneumonitis
- Pneumopericardium
- Pneumoperitoneum
- Pneumoretroperitoneum
- Pneumotaxic center
- Pneumothorax
- Pneumoviridae
- Pneumovirus
- Pocket mask
- Podiatrists
- Podiatry
- Podocalyxin
- Podocin
- Podocyte
- Podophyllin
- Podophyllotoxin
- Podosomes
- Podoviridae
- Poikilocytosis
- Poikiloderma
- Poikiloderma of Civatte
- Point mutations
- Point of care
- Point of care testing