China 
Africa 
- Testicular microlithiasis
- Testicular pain
- Testicular self-examination
- Testicular sperm extraction
- Testicular torsion
- Testicular vein
- Testing effect
- Testolactone
- Testosterone
- Testosterone cypionate
- Testosterone enantate
- Testosterone enanthate
- Testosterone propionate
- Testosterone undecanoate
- TetR
- Tetanic contractions
- Tetanic fade
- Tetanospasmin
- Tetanus
- Tetanus antitoxin
- Tetanus toxin
- Tetanus toxoid
- Tetany
- Tethered cord syndrome
- Tethered spinal cord syndrome
- Tetherin
- Tetrabenazine
- Tetraborate
- Tetrabromobisphenol A
- Tetrabutylammonium
- Tetracaine
- Tetracalcium phosphate
- Tetrachloroethylene
- Tetrachlorvinphos
- Tetracosactide
- Tetracyclic
- Tetracyclic antidepressants
- Tetracycline
- Tetracycline antibiotics
- Tetraethyl orthosilicate
- Tetraethyl pyrophosphate
- Tetraethylammonium
- Tetraethylammonium chloride
- Tetrafluoroethylene
- Tetrahydrobiopterin
- Tetrahydrocannabinol
- Tetrahydrocannabinolic acid
- Tetrahydrocannabivarin
- Tetrahydrocorticosterone
- Tetrahydrocortisol
- Tetrahydrocortisone
- Tetrahydrodeoxycorticosterone
- Tetrahydrofolate
- Tetrahydrofolic acid
- Tetrahydrofurfuryl alcohol
- Tetrahydroharmine
- Tetrahydropalmatine
- Tetrahydropapaveroline
- Tetrahydropyridine
- Tetrahydrozoline
- Tetrahymena
- Tetralin
- Tetralogy of Fallot
- Tetramer
- Tetramer assay
- Tetrameric protein
- Tetramethrin
- Tetramethylammonium
- Tetramethylpyrazine
- Tetramethylsilane
- Tetrandrine
- Tetranitromethane
- Tetraoctylammonium bromide
- Tetraparvovirus
- Tetrapeptide
- Tetraplegia
- Tetraploidy
- Tetrasaccharides
- Tetrasodium EDTA
- Tetrasodium pyrophosphate
- Tetrasomy
- Tetraspanin
- Tetraterpene
- Tetrazepam
- Tetrazolium
- Tetrodotoxin
- Tetronic acid
- Tetulomab
- Teucrium chamaedrys
- Tev protease
- Texas Medication Algorithm Project
- Tezacaftor
- Tezepelumab
- Tezosentan
- Tfap2a
- Tfap2b
- Tg101348
- Th 9 cells
- Th1 cell
- Th17 cells
- Th2 cell
- ThYme
- Thai massage
- Thalamic
- Thalamic nuclei
- Thalamic reticular nucleus
- Thalamocortical radiations
- Thalassemia
- Thalassemia major
- Thalassemia minor
- Thalassiosira pseudonana
- Thalassotherapy
- Thalidomide
- Thallium
- Thanatology
- Thanatophoric dwarfism
- Thanatophoric dysplasia
- Thapsia
- Thapsigargin
- Thaumatin
- The Cancer Genome Atlas
- The Irish Longitudinal Study on Ageing
- The Seed
- The Silver Tsunami
- The Symbolic
- The dose makes the poison
- The hallmarks of cancer
- Theacrine
- Theaflavin
- Theaflavin digallate
- Theaflavin-3-gallate
- Theanine
- Thebaine
- Theca
- Theca cells
- Theca externa
- Theca interna
- Thecal cells
- Thecal sac
- Thecoma
- Theileria
- Theileria parva
- Thelarche
- Thematic coherence
- Thenar
- Thenar eminence
- Thenoyltrifluoroacetone
- Theobroma cacao
- Theobromine
- Theophylline