China 
Africa 
- Daclatasvir
- Daclizumab
- Dacomitinib
- Dacryoadenitis
- Dacryocystitis
- Dacryocystorhinostomy
- Dacryoscintigraphy
- Dactinomycin
- Dactylitis
- Dactylosporangium
- Daf-16
- Daf-2
- Daflon
- Daidzein
- DailyMed
- Dairy products
- Dairying
- Dakin's solution
- Dalbavancin
- Dalcetrapib
- Dalfopristin
- Dalteparin
- Damage control surgery
- Damkohler number
- Dammarane
- Danaparoid
- Danazol
- Dance therapy
- Dance's sign
- Dandelion
- Dander
- Dandruff
- Dandy-Walker syndrome
- Danger model
- Danger space
- Danger triangle of the face
- Danio rerio
- Danis-Weber classification
- Danon disease
- Danoprevir
- Dansyl chloride
- Dantrolene
- Dapagliflozin
- Dapansutrile
- Daphnoretin
- Dapi
- Dapoxetine
- Dapsone
- Daptomycin
- Darapladib
- Daratumumab
- Darbepoetin alfa
- Darexaban
- Darier disease
- Darier's disease
- Darier's sign
- Darifenacin
- Dark adaptation
- Dark cell
- Dark quencher
- Dark therapy
- Dark urine
- Darolutamide
- Darpin
- Dartos
- Darunavir
- Darwinian evolution
- Das28
- Dasabuvir
- Dasatinib
- Data Monitoring Committee
- Data collection
- Data dredging
- Data mining
- Data transformation
- Data-independent acquisition
- Database
- Database of Interacting Proteins
- Date palm
- Date rape drugs
- Datura
- Datura innoxia
- Datura metel
- Datura stramonium
- Daucosterol
- Daucus carota
- Daughter cells
- Daunorubicin
- Daunosamine
- Dauricine
- Dawn phenomenon
- Dawn simulation
- Day hospital
- Daytime wetting
- Db db mouse
- DbSNP
- De Barsy Syndrome
- De Barsy syndrome
- De Musset's sign
- De Quervain's thyroiditis
- De novo mutations
- Deacetylation
- Deacylation
- Dead end filtration
- Dead space
- Dead tissue
- Deadlifts
- Deae sepharose
- Deae-sepharose
- Deaf community
- Deaf hearing
- Deafblindness
- Deafferentation
- Deafferentation pain
- Deafness
- Dealkylation
- Deaminase
- Deamination
- Deanol
- Death
- Death anxiety
- Death certificate
- Death domain
- Death drive
- Death effector domain
- Death receptor
- Death receptor 5
- Death-inducing signaling complex
- Debaryomyces hansenii
- Debridement
- Debriefing
- Debrisoquine
- Debulking
- Debye length
- Decaborane
- Decaffeination
- Decalcification
- Decalin
- Decamethonium
- Decamethylcyclopentasiloxane
- Decanal
- Decanoic acid
- Decarboxylase
- Decarboxylase inhibitor
- Decatastrophizing
- Decathexis
- Decay accelerating factor
- Decay scheme
- Decay series
- Decay-accelerating factor