- trouble
- troughing
- trousers joint
- truck refrigeration
- true temperature
- tripping fuse
- trisistor
- tritanopia
- triton
- truncated
- trunk exchange
- truth table
- tube bank
- tube blocking
- tube condenser
- tube freezer
- tube ice
- tubeless
- tubular cooler
- tubular evaporator
- Tufnol
- tuned transformer
- tungar tube
- tungsten arc
- tungsten filament
- tuning screw
- tunnel cooling
- tunnel diode
- tunnel effect
- tunnel refrigeration
- tunnel thawing
- tunneling
- turbidity
- turbocompressor
- turboexhauster
- turboexpander
- turbopump
- turborefrigeration machine
- turborefrigerator
- turbulence
- turbulence promoter
- turbulent convection
- turbulent flow
- turn-knob
- turnbuckle
- turning gear
- tweezers
- Tyndal effect
- typography
- ultimate
- ultra-centrifugation
- ultra-pure
- ultracentrifuge
- ultradirectional microphone
- ultramicroscopic
- ultrashort band
- ultrasonic defrosting
- ultrasonic imaging
- ultravacuum
- ultraviolet catastrophe
- ultraviolet imagery
- umbra
- unaccommodated
- unallowable
- unambiguous
- unbound electron
- unbound moisture
- uncharged
- uncondensable gas
- uncontrollable
- uncouple
- turns ratio
- twining
- twister
- twisting strain
- type
- U-link
- udometry
- ultimate line
- ultrahigh-speed
- unaided eye
- uncoupling
- under damping
- under pressure
- undercompensation
- undercooling rate
- undercurrent
- twilight
- twin
- twin tetrode
- two-port
- udometer
- ultracold application
- ultrahigh vacuum
- ultramicrometer
- ultraphotic rays
- ultrarapidly frozen
- ultrasonic converter
- ultrasonic sounding
- Umklapp process