- tower telescope
- track pitch
- torsional strain
- total dispersion
- total reflux
- touch control
- tower radiator
- toxic refrigerant
- tractrix
- trade-wind
- topographic contrast
- toroidal transformer
- torque motor
- torque ripple
- total enthalpy
- total hardness
- total losses
- total refrigeration
- tower loading
- Townsend avalanche
- toxicity
- tracer
- tracer element
- tracer method
- trackball
- tracking filter
- traction motor
- traffic intensity
- traffic load
- traffic loss
- traffic routing
- trailer
- train
- train line
- transadmittance
- transcurial
- transductor
- transfer correction
- transfer graph
- transfer line
- transfer locus
- transfer switch
- transfer tripping
- transference number
- transform
- transformation ratio
- transformation temperature
- transformer bridge
- transformer coupling
- transformer hybrid
- transformer oil
- transformer rectifier
- transient characteristic
- transient temperature
- transistor-meter
- transit temperature
- transition point
- translate
- translucent ice
- transmissibility
- transmission
- transmission line
- transmission plan
- transmission substation
- transmit channel
- transmitter
- transmultiplexing
- transolver
- transplutonium
- transport delay
- transport vessel
- transposition
- transverse stress
- trapezium
- transformer voltage
- transient stability
- transistor amplifier
- transistor coupling
- transit icing
- transit instrument
- transition capacity
- transition frequency
- transition inductor
- transition loss
- transition temperature
- transmission access
- transmission band
- transmission dynamometer
- transmission mode
- transmitter noise
- transmitting end
- transmittivity
- transmutation
- transoceanic
- transpiration
- transport number
- transportable refrigeration
- transuranium
- transverse magnetoresistance
- trapezoidal generator