- Triglav gentian
- triglyceride transfer protein
- triglycerides
- trigonometrical functions
- trigonometric equation
- triiodoarsane
- triiodide
- trikitixa
- trikonasana
- tricot yarn
- tricresyl phosphate , TCP
- tricresyl phosphates , TCP
- tricresyl phosphate intoxication
- tricresyl phosphate poisoning
- tricuspid valve atresia
- tricuspid valve insufficiency
- tricuspid valve regurgitation
- Trilex rim
- trilithionite
- thousand trillionth
- Trilogy of Terror II
- trimagnesium diphosphide
- trimanganese tetroaxide
- trimanganese tetroxide
- trimethoxyboroxine
- trimethylaluminium, TMA
- trimethylamine, TMA
- trimethylamine oxide, TMAO , TMANO
- trimethylamine oxide , TMAO , TMANO
- trimethylaminuria, TMAU
- trimethylarsine
- trimethylborane , TMB
- trimethylboroxine
- trimethylchlorosilane, TMCS
- trimethylene imine
- trimethyl isocyanurate
- trimethylsilylchloride, TMS-CI
- trimethylsulfonium iodide
- trimethylthallium
- trimix
- trim trail
