China 
Africa 
- Cystic fibrosis-related diabetes
- Cystic hygroma
- Cystic lymphangioma
- Cysticerci
- Cysticercosis
- Cystine
- Cystine knot
- Cystinosis
- Cystinuria
- Cystitis
- Cystitis glandularis
- Cystocele
- Cystogastrostomy
- Cystography
- Cystoid macular edema
- Cystoisospora
- Cystoisospora belli
- Cystometry
- Cystoprostatectomy
- Cystoscopy
- Cystostomy
- Cystourethrocele
- Cystourethrography
- Cysts
- Cysts of the jaws
- Cytapheresis
- Cytarabine
- Cytidine
- Cytidine deaminase
- Cytidine diphosphate
- Cytidine monophosphate
- Cytisine
- Cytoarchitectonics
- Cytoarchitecture
- Cytocentrifuge
- Cytochalasin
- Cytochalasin B
- Cytochalasin D
- Cytochalasin E
- Cytochemistry
- Cytochrome
- Cytochrome P450
- Cytochrome b
- Cytochrome b5 deficiency
- Cytochrome c
- Cytochrome c oxidase
- Cytochrome c oxidase subunit I
- Cytochrome c1
- Cytochrome oxidase
- Cytochrome p450 1a1
- Cytochrome p450 2c9
- Cytochrome p450 2d6
- Cytochrome p450 2e1
- Cytochrome p450 3a4
- Cytochrome p450 reductase
- Cytogenetics
- Cytoglobin
- Cytokeratin
- Cytokeratin 18
- Cytokeratin 19
- Cytokeratin 20
- Cytokeratin 5
- Cytokeratin 7
- Cytokeratin 8
- Cytokine
- Cytokine release syndrome
- Cytokine storm
- Cytokine storm syndrome
- Cytokines
- Cytokinesis
- Cytokinin
- Cytolethal distending toxin
- Cytology
- Cytolysin
- Cytolysis
- Cytolytic
- Cytomegalovirus
- Cytomegalovirus colitis
- Cytomegalovirus infection
- Cytomegalovirus retinitis
- Cytometry
- Cytopathic effect
- Cytopathogenic effect
- Cytopathologist
- Cytopathology
- Cytopenia
- Cytophaga
- Cytoplasmic
- Cytoplasmic dynein
- Cytoplasmic inclusions
- Cytoplasmic incompatibility
- Cytoplasmic streaming
- Cytoplast
- Cytoprotection
- Cytoreductive surgery
- Cytosine
- Cytosine deaminase
- Cytoskeletal drugs
- Cytoskeletal proteins
- Cytoskeleton
- Cytosol
- Cytostasis
- Cytostatic agent
- Cytostome
- Cytotechnologists
- Cytotoxic
- Cytotoxic T cells
- Cytotoxic T lymphocytes
- Cytotoxic T-cells
- Cytotoxic agents
- Cytotoxicity
- Cytotoxins
- Cytotrophoblast
- Czapek medium
- D fructose
- D glucose
- D isomer
- D loop
- D-161
- D-DOPA
- D-amino acid dehydrogenase
- D-amino acid oxidase activator
- D-amino acids
- D-dimer
- D-glyceraldehyde
- D-lactate dehydrogenase
- D1-like receptor
- D2
- D2 Test of Attention
- D2-like receptor
- D4
- DAB1
- DABCO
- DALY
- DAMGO
- DAPK1
- DASH diet
- DASS
- DAT
- DAX1
- DBP
- DBT
- DC-SIGN
- DCIS
- DCX
- DDIT3
- DDR2
- DDT
- DEAF1
- DEXA