- trapezoidal wave
- traversal
- tray evaporator
- treated air
- triaxial
- triboelectric series
- trichroism
- trichromatic
- trick
- trickle
- trifurcating box
- trigger gate
- trimming
- trip coil
- trigger switch
- trigonometric function
- trigonometric integral
- trihedron
- tripartition
- triple
- triple cascade
- triple point
- triplet
- triplex
- triplexer
- tritium
- trolley
- trolley wire
- tropical switch
- tropicalization test
- trough
- truncated cone
- transformer hum
- transformer kiosk
- transformer noise
- transformer ratio
- transhybrid loss
- transient response
- transit
- transit cooling
- transit time
- transition
- transition element
- transition resistor
- translucent film
- transmission coefficient
- transmit
- transonic aerodynamics
- transparence
- transparent ice
- transport refrigeration
- transportable
- transposed
- transverse contraction
- transverse interference
- transverse resistivity
- trapezium distortion
- trapped oil
- tray freezer
- tray froster
- treated
- treatment
- trellis
- trembler
- trembling bell
- trunk
- trunking
- trunking diagram
- tube cleaner
- tube evaporator
- tube insulation
- tubing coil
- tubular capacitor
- tubular condenser
- tumbler switch
- tunable
- tuning coil
- tuning wand
- tunnel cooler
- tunnel defrosting
- tunneling effect
- turbid
- turbidimeter
- turbine compressor
- turbine expander
- trend
- triangle
- triangle connection
- triangular noise
- triangulation
- triboelectricity
- triboluminescence
- trifocal
- trigger circuit
- trigger current
- trimmer
- tripler
- triplex cable
- trolley pole
- trombone