unda - vale
- undamped amplitude wave
- undamped frequency
- undamped harmonic oscillator
- undamped mode
- undamped motion
- undamped oscillation
- undamped vibration
- undecorated dislocation
- undeflected beam
- undeflected wave
- undeformed nucleus
- undeformed wave
- undegraded neutron
- under development
- under tension
- under-water echo sounding
- underbunching
- undercorrected astigmatism
- underdamping
- underestimate
- underestimating
- underestimation
- underexposure
- undergo a reaction
- underground disposal
- underground explosion
- underground gamma survey
- underground percolation
- underground storage
- underground structure
- underground water
- underground-water flow
- underlayer
- underline
- underload
- underlying surface
- undermining pitting
- undermoderated
- undermoderated lattice
- underpopulated