支原体目：为柔膜体纲(Mollicutes)之一目，本目之生物缺乏坚实细胞壁而仅以三层膜所包绕。本目由无胆甾原体科(Acholeplasmataceae)、支原菌科(Mycoplasmataceae)、螺旋原体科(Spiroplasmataceae)以及两种未确定科的属即厌氧原体属(Anaeroplasma)和热原体属(Thermoplasma)组成- trinitroglycerin
- trinitroglycerol
- trinitrophenol
- trinitrotoluene
- trinomial
- trinucleate
- trinucleotide
- triocephalus
- triochidism
- Triodontophorus diminutus
- triolein
- triolism
- triophthalmos
- triopodymus
- triorchid
- triorchis
- triorchism
- triose
- triosephosphate dehydrogenase
- triosephosphate isomerase
- triotus
- trioxide
- trioxsalen
- trioxypurine
- tripalmitin