China
Africa
- UST
- USV
- UTC
- UTF-8
- UTI
- UTM
- UV curing
- UV degradation
- UV filters
- UV index
- UVM
- Ubbelohde viscometer
- Ubiquinone
- Ubiquitin
- Ubiquitin ligase
- Ubiquitous computing
- Ubiquity
- Ubuntu
- Ubuntu Mate
- Uclust
- Udel
- Ulcerative colitis
- Ulcers
- Ulexite
- Ullage
- Ullmann reaction
- Ulnar
- Ulnar artery
- Ulnar deviation
- Ulnar nerve
- Ulnar styloid process
- Ultimate tensile strength
- Ultra mega solar power projects
- Ultra-high temperature ceramics
- Ultra-high-molecular-weight polyethylene
- Ultra-wideband
- Ultrafast electron diffraction
- Ultrafast x-ray
- Ultrafilter
- Ultrafiltration
- Ultrafine particles
- Ultramafic
- Ultramafic rock
- Ultrametric space
- Ultrapure water
- Ultrashort pulse laser
- Ultrashort pulses
- Ultrasonic cleaning
- Ultrasonic consolidation
- Ultrasonic flow meter
- Ultrasonic horn
- Ultrasonic impact treatment
- Ultrasonic machining
- Ultrasonic motor
- Ultrasonic nozzle
- Ultrasonic soldering
- Ultrasonic testing
- Ultrasonic thickness measurement
- Ultrasonic transducer
- Ultrasonic welding
- Ultrasound
- Ultrasound biomicroscopy
- Ultrasound energy
- Ultrasparc
- Ultrastructure
- Ultraviolet
- Ultraviolet divergence
- Ultraviolet germicidal irradiation
- Ulvospinel
- Umber
- Umbilical arteries
- Umbilical artery
- Umbilical cable
- Umbilical cord
- Umbilical vein
- Umbrella sampling
- Umklapp scattering
- Unanimous
- Unary functions
- Unary operations
- Unavailability
- Unbalanced
- Unbalanced lines
- Unbiased
- Unbounded operator
- Uncertain data
- Uncertain inference
- Uncertainty
- Uncertainty analysis
- Uncertainty parameter
- Uncertainty principle
- Uncertainty quantification
- Uncompressed video
- Unconformity
- Unconscious mind
- Unconsolidated
- Uncontrolled airspace
- Unconventional oil
- Uncorrelated
- Uncorrelatedness
- Uncountable
- Uncoupler
- Uncoupling
- Uncoupling protein
- Undecidable
- Undecylenic acid
- Underactuated
- Underactuation
- Underbalanced drilling
- Undercut
- Undercuts
- Underdetermined
- Underdetermined system
- Underfloor air distribution
- Underfloor heating
- Underground
- Underground city
- Underground coal gasification
- Underground construction
- Underground hard-rock mining
- Underground mining
- Underground power station
- Underpinning
- Underpotential deposition
- Undersampling
- Undersea tunnel
- Undertow
- Undervalued
- Underwater
- Underwater acoustic communication
- Underwater acoustics
- Underwater environment
- Underwater explosions
- Underwater glider
- Underwater vehicles
- Underwater welding
- Underweight
- Underwriting
- Undo
- Undulator
- Undulatory locomotion
- Undulose extinction
- Unevenly spaced time series
- Unibody
- Unicellular
- Unicode
- Unicorns
- Unicycle
- Unification
- Unified communications