- trial by battle
- trial by fire
- trial court
- trial examiner
- trial horse
- trial jury
- trial lawyer
- triallist
- trial marriage
- trialogue
- trial run
- trials and tribulations
- trialware
- triamcinolone
- Trianda
- triangle
- triangle inequality
- triangle of forces
- triangular
- triangular matrix
- triangular trade
- triangulate
- triangulation
- triangulation station
- Triangulum
- Triangulum Australe
- triannual
- triapsidal
- triarchy
- triaryl
- triarylmethane dye
- Triassic
- triathlete
- triathlon
- triatic stay
- triatomic
- triaxial
- triazine
- triazoic
- triazole
- trib.
- tribade
- tribadism
- tribal
- tribalism
- tri-band
- tribasic
- tribe
- tribelet
- tribesman
- tribespeople
- tribeswoman
- triblet
- tribo-
- triboelectricity
- tribology
- triboluminescence
- tribrach
- tribromide
- tribromoacetaldehyde
- tribromoethanol
- tribulation
- tribunal
- tribunate
- tribune
- Tribune Group
- tributary
- tribute
- tribute band
- tricalcium silicate
- tricameral
- tricarboxylic
- tricarboxylic acid cycle
- tricarpellary
- trice
- tricentenary
- tricentennial
- tricep
- triceps
- triceratops
- trich-
- trichiasis
- trichina
- trichinize
- Trichinopoly
- trichinosis
- trichinous
- trichion
- trichite
- trichlorfon
- trichloride
- trichloroacetaldehyde
- trichloroacetic acid
- trichloroethane
- trichloroethylene
- trichlorofluoromethane
- trichloromethane
- trichloromethyl chloroformate
- trichloronitromethane
- trichlorophenoxyacetic acid
- tricho-
- trichocyst
- trichogramma
- trichogyne
- trichoid
- trichology
- trichome
- trichomonad
- trichomonas
- trichomoniasis
- trichonotid
- trichonymph
- trichopteran
- trichopteron
- trichopterous
- trichosis
- trichothecene
- trichotillomania
- trichotomy
- trichotomy property
- trichroic
- trichroism
- trichromat
- trichromatic
- trichromatism
- trichuriasis
- tri-city
- trick
- trick cyclist
- trick ending
- trickery
- trickish
- trick knee
- trickle
- trickle charge
- trickle charger
- trickle-down
- trickle-down theory
- trickle irrigation
- trickle-up
- trick or treat
- trick-or-treat
- trick out
- tricks of the trade
- tricksome
- trickster
- tricksy
- tricktrack
- trick-track
- tricky
- triclad
- triclinic
- triclinium
- triclosan
- tricolette
- tricolor
- tricolor camera
- tricolored heron
- tricolour
- tricorn
- tricornered
- tricostate
- tricot
- tricotine
- tricotyledonous
- tricresol
- tricrotic
- trictrac
- tricuspid
- tricuspidate
- tricuspid valve
- tricyanic acid
- tricycle
- tricyclic
- trid.
- Tridacna
- tridactyl
- tridarn cupboard
- trident
- Trident
- tridentate
- Tridentine
- Tridentum
- tridimensional
- triduum
- tridymite
- triecious
- tried
- tried and true
- tried-and-true
- triella
- triene
- triennial
- triennium
- triens
- Trient
- trier
- Trier
- trierarch
- trierarchy
- tries
- Trieste
- triethyl
- triethylamine
- triethyl orthoformate
- trifacial
- trifacial neuralgia
- trife
- TRIFE
- trifecta
- triffid
- trifid
- trifid foot
- trifle
- trifling
- trifluoperazine
- trifluoride
- trifluorochloromethane
- trifluralin
- trifocal
- trifold
- trifoliate
- trifoliate orange
- trifoliolate
- trifolium
- triforium
- triform
- trifunctional
- trifurcate
- trig
- trig.
- triga
- trigamous
- trigamy
- trigeminal
- trigeminal nerve
- trigeminal neuralgia
- trigeneration
- Trigère
- trig function
- trigger
- triggered
- trigger finger
- triggerfish
- trigger happy
- trigger-happy
- triggerman
- trigger mechanism
- trigger plant
- trigger warning
- trigger word
- triglyceride
- triglyph
- trigo
- trigon
- trigon.
- trigonal
- trigonal trisoctahedron
- trigone
- trigonometric equation
- trigonometric function
- trigonometric series
- trigonometry
- trigonous
- trigonum
- trig point
- trigram
- trigraph
- trihalomethane
- trihedral
- trihedron
- trihydrate
- trihydric
- trihydroxy
- triiodomethane
- triiodothyronine
- trijet
- trijugate
- trike
- Trikora
- Trilafon
- trilateral
- trilateralism
- trilateration
- trilby
- trilemma
- trilinear
- trilingual
- triliteral
- triliteralism
- trilithon
- trill
- Trilling
- trillion
- trillionaire
- trillium
- trilobate
- trilobed
- trilobite
- trilocular
