- Preproenzyme
- Preprohormone
- Preproinsulin
- Prepuce
- Prepulse inhibition
- Preputial gland
- Preputioplasty
- Preribosomal RNA
- Presacral fascia
- Presacral neurectomy
- Presacral space
- Presatovir
- Presbyacusis
- Presbycusis
- Presbyopia
- Presbyphagia
- Prescription Drug User Fee Act
- Prescription drug prices in the United States
- Prescription drugs
- Prescription monitoring program
- Presenilin
- Presenilin-1
- Present bias
- Presentation
- Presepsin
- Preservatives
- Presidential Commission for the Study of Bioethical Issues
- Pressor response
- Pressure
- Pressure chamber
- Pressure control
- Pressure dressing
- Pressure jump
- Pressure of speech
- Pressure overload
- Pressure points
- Pressure sensitive adhesive
- Pressure support ventilation
- Pressure ulcers
- Pressure urticaria
- Pressured speech
- Prestin
- Presubiculum
- Presumed ocular histoplasmosis syndrome
- Presynaptic inhibition
- Presynaptic membrane
- Presynaptic neuron
- Presynaptic terminal
- Presyncope
- Pretectal area
- Pretectum
- Preterm birth
- Pretest
- Pretibial myxedema
- Pretomanid
- Pretracheal fascia
- Prevalence
- Prevalence of mental disorders
- Prevalence rate
- Preventable causes of death
- Prevention Paradox
- Prevention of mental disorders
- Prevention science
- Preventive mastectomy
- Prevertebral fascia
- Prevertebral muscles
- Prevertebral space
- Prevotella
- Prevotella bivia
- Prevotella intermedia
- Prevotella melaninogenica
- Prevotellaceae
- Priapism
- Pridopidine
- Prilocaine
- PrimPol
- Primaquine
- Primary active transport
- Primary age-related tauopathy
- Primary alcohols
- Primary amenorrhea
- Primary amines
- Primary amoebic meningoencephalitis
- Primary auditory cortex
- Primary biliary cholangitis
- Primary biliary cirrhosis
- Primary bronchi
- Primary care behavioral health
- Primary carnitine deficiency
- Primary central nervous system lymphoma
- Primary cilia
- Primary ciliary dyskinesia
- Primary consciousness
- Primary cutaneous amyloidosis
- Primary cutaneous follicle center lymphoma
- Primary cutaneous marginal zone lymphoma
- Primary dentition
- Primary effusion lymphoma
- Primary health care
- Primary hyperaldosteronism
- Primary hyperparathyroidism
- Primary immunodeficiency disorders
- Primary lateral sclerosis
- Primary mediastinal (thymic) large B-cell lymphoma
- Primary mediastinal B-cell lymphoma
- Primary mediastinal large B cell lymphoma
- Primary metabolites
- Primary motor cortex
- Primary nursing
- Primary olfactory cortex
- Primary peritoneal carcinoma
- Primary pigmented nodular adrenocortical disease
- Primary polydipsia
- Primary progressive aphasia
- Primary reinforcer
- Primary sclerosing cholangitis
- Primary sensory areas
- Primary sexual characteristics
- Primary somatosensory cortex
- Primary standard
- Primary transcripts
- Primary tuberculosis
- Primary tumors
- Primary visual cortex
- Primase
- Prime editing
- Prime mover
- Primer binding site
- Primer dimer
- Primer extension
- Primidone
- Primigravida
- Priming
- Priming effect
- Primitive atrium
- Primitive neuroectodermal tumor
- Primitive reflexes
- Primitive streak
- Primordial dwarfism
- Primordial follicles
- Primordial germ cells
- Primordial soup
- Primrose oil
- Principal component regression
- Principal coordinate analysis
- Principal investigator
- Principle of double effect
- Principle of least effort
- Pringle manoeuvre
- Prinomastat