China 
Africa 
- Trial frame
- Trial of labour
- Triamcinolone
- Triamcinolone acetonide
- Triamcinolone diacetate
- Triamcinolone hexacetonide
- Triamterene
- Triangle of auscultation
- Triangles of the neck
- Triangular face
- Triangular fibrocartilage
- Triangular space
- Triatoma
- Triatoma dimidiata
- Triatoma infestans
- Triatominae
- Triazenes
- Triazine
- Triazolam
- Triazole
- Triazolobenzodiazepine
- Tributylamine
- Tributyltin
- Tributyltin chloride
- Tributyltin oxide
- Tributyrin
- Tricaine
- Tricalcium aluminate
- Tricalcium phosphate
- Tricarboxylic acid cycle
- Triceps
- Triceps brachii muscle
- Triceps reflex
- Triceps surae muscle
- Tricetin
- Trichiasis
- Trichilemmal carcinoma
- Trichilemmal cyst
- Trichilemmoma
- Trichilia
- Trichinella
- Trichinella spiralis
- Trichinosis
- Trichloroacetic acid
- Trichloroethylene
- Trichlorophenol
- Trichobezoar
- Trichoblastoma
- Trichobothria
- Trichoderma reesei
- Trichodysplasia spinulosa
- Trichoepithelioma
- Trichology
- Trichomegaly
- Trichomonas
- Trichomonas tenax
- Trichomonas vaginalis
- Trichomoniasis
- Trichophagia
- Trichophyton
- Trichophyton interdigitale
- Trichophyton mentagrophytes
- Trichophyton rubrum
- Trichophyton tonsurans
- Trichophyton verrucosum
- Trichorrhexis invaginata
- Trichorrhexis nodosa
- Trichosanthes
- Trichosanthes kirilowii
- Trichosanthin
- Trichoscopy
- Trichosporon
- Trichosporonosis
- Trichostasis spinulosa
- Trichostatin a
- Trichothiodystrophy
- Trichotillomania
- Trichromacy
- Trichrome
- Trichrome stain
- Trichuriasis
- Trichuris
- Trichuris muris
- Trichuris suis
- Trichuris trichiura
- Tricin
- Tricine
- Triclabendazole
- Triclocarban
- Triclofos
- Triclopyr
- Triclosan
- Tricresyl phosphate
- Tricuspid atresia
- Tricuspid regurgitation
- Tricuspid valve
- Tricuspid valve stenosis
- Tricyclic
- Tricyclic antidepressant overdose
- Tricyclic antidepressants
- Tridimensional Personality Questionnaire
- Trier social stress test
- Triethanolamine
- Triethoxysilane
- Triethyl citrate
- Triethyl phosphite
- Triethylene glycol
- Triethylenemelamine
- Triethylenetetramine
- Trif
- Trifarotene
- Trifascicular block
- Triflate
- Triflic acid
- Trifluoperazine
- Trifluoroacetic anhydride
- Trifluoromethyl group
- Triflupromazine
- Trifluralin
- Trifluridine
- Triflusal
- Trifolium repens
- Trifunctional antibody
- Trigeminal autonomic cephalalgia
- Trigeminal autonomic cephalalgias
- Trigeminal ganglion
- Trigeminal lemniscus
- Trigeminal motor nucleus
- Trigeminal nerve
- Trigeminal neuralgia
- Trigeminal nucleus
- Trigeminal trophic syndrome
- Trigeminovascular system
- Trigger finger
- Trigger points
- Trigger zone
- Triglyceride lipase
- Triglycerides
- Trigone
- Trigonella foenum graecum
- Trigonelline
- Trigonocephaly
- Triheptanoin
- Trihexyphenidyl
- Trihydroxybenzoic acid
- Triiodide
- Triiodothyronine
- Trikafta
- Triketone
- Trilaciclib