China 
Africa 
- Dorsal stream
- Dorsal tegmental nucleus
- Dorsal vertebrae
- Dorsalis pedis artery
- Dorsiflexion
- Dorsolateral prefrontal cortex
- Dorsomedial hypothalamic nucleus
- Dorsomedial prefrontal cortex
- Dorsum sellae
- Dorzolamide
- Dosage compensation
- Dosage forms
- Dose
- Dose area product
- Dose dumping
- Dose fractionation
- Dose profile
- Dose rate
- Dose response
- Dose response relationship
- Dose-dense chemotherapy
- Dose-ranging study
- Dose-response curve
- Dose-response relationship
- Dose-volume histogram
- Dosha
- Dosimeters
- Dosimetry
- Dosing
- Dostarlimab
- Dosulepin
- Dot blot
- Dot plot
- Dotatoc
- Double Bubble
- Double Deficit
- Double aortic arch
- Double balloon enteroscopy
- Double contrast barium enema
- Double depression
- Double inlet left ventricle
- Double lumen tube
- Double minute chromosomes
- Double outlet right ventricle
- Double pneumonia
- Double stranded DNA
- Double stranded RNA
- Double-balloon enteroscopy
- Double-contrast barium enema
- Double-disk diffusion test
- Double-stranded RNA
- Double-stranded RNA viruses
- Doublecortin
- Doublesex
- Doubling time
- Doubly labeled water
- Doulas
- Dounce homogenizer
- Dovitinib
- Down regulation
- Down syndrome
- Downregulation and upregulation
- Downstream processing
- Doxacurium
- Doxapram
- Doxazosin
- Doxepin
- Doxercalciferol
- Doxifluridine
- Doxil
- Doxorubicin
- Doxycycline
- Doxylamine
- Dracunculiasis
- Dracunculus
- Dracunculus medinensis
- Dragon NaturallySpeaking
- Dragon's blood
- Draize test
- Drama therapy
- Dravet syndrome
- Draw-a-Person test
- Draw-a-person test
- Drawer test
- Dream speech
- Dreaming
- Dress syndrome
- Dressler syndrome
- Dressler's syndrome
- Dried blood spot
- Dried blood spot testing
- Drinking
- Drinking water
- Drive theory
- Driving phobia
- Dromotropic
- Dronabinol
- Dronedarone
- Drones
- Drooling
- Drop attack
- Droperidol
- Dropping out
- Drosha
- Drosophila
- Drosophila melanogaster
- Drospirenone
- Drotaverine
- Drotrecogin alfa
- Drowning
- Drowsy driving
- Droxicam
- Droxidopa
- Drug Efficacy Study Implementation
- Drug Price Competition and Patent Term Restoration Act
- Drug absorption
- Drug abuse
- Drug action
- Drug administration
- Drug allergy
- Drug approval
- Drug bioavailability
- Drug carriers
- Drug checking
- Drug clearance
- Drug combination
- Drug court
- Drug craving
- Drug culture
- Drug delivery
- Drug delivery device
- Drug delivery systems
- Drug delivery to the brain
- Drug dependence
- Drug design
- Drug detoxification
- Drug development
- Drug discovery
- Drug disposal
- Drug distribution
- Drug education
- Drug effect
- Drug elimination
- Drug eluting stent
- Drug eruption
- Drug expiration
- Drug fever
- Drug formulary
- Drug formulation
- Drug half life