- Indium tin oxide
- Individualized medicine
- Indo-1
- Indocyanine green
- Indolamines
- Indole
- Indole 3 butyric acid
- Indole 3 carbinol
- Indole alkaloids
- Indole test
- Indole-3-acetic acid
- Indolent lymphoma
- Indoline
- Indolizidine
- Indolizidine alkaloids
- Indolizine
- Indolocarbazole
- Indometacin
- Indomethacin
- Indoor air quality
- Indoor residual spraying
- Indoor tanning
- Indoprofen
- Indoxacarb
- Indoxyl
- Indoxyl sulfate
- Induced abortion
- Induced cell cycle arrest
- Induced coma
- Induced fit model
- Induced ovulation
- Induced pluripotent stem cells
- Inducers
- Inducible nitric oxide synthase
- Induction chemotherapy
- Induction period
- Inductive logic
- Inductive reasoning
- Inductively coupled plasma atomic emission spectroscopy
- Inductively coupled plasma mass spectrometry
- Indusium griseum
- Industrial fermentation
- Industrial radiography
- Industrial robots
- Industrial waste
- Industrial wastewater
- Inebilizumab
- Ineffective erythropoiesis
- Inelastic scattering
- Inequality
- Inequality in disease
- Inert gases
- Infant bed
- Infant formula
- Infant massage
- Infant respiratory distress syndrome
- Infantile acne
- Infantile digital fibromatosis
- Infantile esotropia
- Infantile hemangioma
- Infantile hypotonia
- Infantile myofibromatosis
- Infantile neuroaxonal dystrophy
- Infantile neuronal ceroid lipofuscinosis
- Infantile refsum disease
- Infantile spasms
- Infants
- Infarction
- Infection prevention and control
- Infections
- Infectious bursal disease
- Infectious causes of cancer
- Infectious diarrhea
- Infectious diseases
- Infectious dose
- Infectious mononucleosis
- Infectious period
- Infectious tolerance
- Infective endocarditis
- Infectivity
- Inferential statistics
- Inferior alveolar artery
- Inferior alveolar nerve
- Inferior angle of the scapula
- Inferior cerebellar peduncle
- Inferior cluneal nerve
- Inferior colliculus
- Inferior crus
- Inferior epigastric artery
- Inferior epigastric vein
- Inferior epigastric vessels
- Inferior frontal gyrus
- Inferior genicular arteries
- Inferior gluteal artery
- Inferior gluteal nerve
- Inferior gluteal vein
- Inferior gluteal veins
- Inferior hypogastric plexus
- Inferior hypophyseal artery
- Inferior hypophysial artery
- Inferior longitudinal fasciculus
- Inferior medullary velum
- Inferior mesenteric artery
- Inferior mesenteric vein
- Inferior myocardial infarction
- Inferior nasal concha
- Inferior oblique muscle
- Inferior olivary nucleus
- Inferior ophthalmic vein
- Inferior orbital fissure
- Inferior parietal lobule
- Inferior petrosal sinus
- Inferior petrosal sinus sampling
- Inferior phrenic arteries
- Inferior phrenic artery
- Inferior phrenic vein
- Inferior phrenic veins
- Inferior rectus muscle
- Inferior sagittal sinus
- Inferior temporal cortex
- Inferior temporal gyrus
- Inferior thyroid artery
- Inferior thyroid veins
- Inferior tibiofibular joint
- Inferior vena cava
- Inferior vena cava filter
- Inferior vesical artery
- Inferiority complex
- Infertility
- Infestation
- Infiltration
- Infiltrative ophthalmopathy
- Inflammaging
- Inflammasome
- Inflammation
- Inflammatory arthritis
- Inflammatory bowel disease
- Inflammatory breast cancer
- Inflammatory cell
- Inflammatory cytokines
- Inflammatory diseases
- Inflammatory disorder
- Inflammatory linear verrucous epidermal nevus
- Inflammatory mediators
- Inflammatory myofibroblastic tumor
- Inflammatory myofibroblastic tumour
- Inflammatory myopathy
- Inflammatory pseudotumor
- Inflammatory reflex
- Inflammatory response