- Photobiology
- Photobleaching
- Photocatalysis
- Photocatalysts
- Photocathode
- Photocells
- Photochemistry
- Photochemotherapy
- Photochromic
- Photodermatitis
- Photodermatosis
- Photodisruption
- Photodynamic therapy
- Photoelectric effect
- Photoelectron
- Photoelectron spectroscopy
- Photoexcitation
- Photofluorography
- Photoglottography
- Photography
- Photoimmunotherapy
- Photoinduced electron transfer
- Photoinitiator
- Photoisomerization
- Photokeratitis
- Photolyase
- Photolysis
- Photomedicine
- Photometer
- Photometry
- Photomicrographs
- Photomultiplier
- Photomultiplier tubes
- Photooxidation
- Photoperiod
- Photoperiodicity
- Photoperiodism
- Photopheresis
- Photophobia
- Photopic vision
- Photopigments
- Photoplethysmogram
- Photoplethysmography
- Photopolymer
- Photoprotection
- Photopsia
- Photoreceptor cells
- Photoreceptor layer
- Photoreceptors
- Photoresist
- Photorespiration
- Photorhabdus luminescens
- Photosensitive
- Photosensitive epilepsy
- Photosensitivity
- Photosensitizers
- Photosynthetic bacteria
- Photosynthetic organism
- Photosynthetic pigments
- Photosystem I
- Photosystem II
- Photosystems
- Phototaxis
- Phototherapeutic keratectomy
- Photothermal effect
- Photothermal therapy
- Phototoxicity
- Phototransduction
- Phototrophs
- Phototropism
- Photovoltaic effect
- Photovoltaics
- Phox2a
- Phox2b
- Phragmites
- Phred
- Phred quality score
- Phrenic nerve
- Phrenitis
- Phrenology
- Phronesis
- Phthalates
- Phthalazine
- Phthalic acid
- Phthalic anhydride
- Phthalide
- Phthalocyanine
- Phthisis bulbi
- Phycobilin
- Phycobiliprotein
- Phycobilisomes
- Phycocyanin
- Phycoerythrin
- Phycomyces
- Phycomycosis
- Phyllanthus emblica
- Phyllodes tumors
- Phylloquinone
- Phylogenesis
- Phylogenetic relationship
- Phylogenetic tree
- Phylogenetics
- Phylogenomics
- Phylogeny
- Physalin
- Physalis
- Physalis peruviana
- Physiatrist
- Physical abuse
- Physical activity
- Physical activity level
- Physical chemistry
- Physical dependence
- Physical disability
- Physical disorders
- Physical education
- Physical examination
- Physical exercise
- Physical exertion
- Physical fitness
- Physical intimacy
- Physical literacy
- Physical stimulation
- Physical therapy
- Physical therapy education
- Physical urticaria
- Physician
- Physician Orders for Life-Sustaining Treatment
- Physician self-referral
- Physiological arousal
- Physiological conditions
- Physiological cross-sectional area
- Physiological effect
- Physiological effects
- Physiological stress
- Physiological tremor
- Physiologically based pharmacokinetic modelling
- Physiology
- Physiome
- Physostigma venenosum
- Physostigmine
- Phytane
- Phytanic acid
- Phytantriol
- Phytase
- Phytate
- Phytic acid
- Phytoalexin
- Phytobezoar
- Phytochelatin