uncrossed - ussingite
- uncrossed
- uncrystalline
- unctuos
- unctuous
- unctuous clay
- uncut
- unda
- undaform
- undamped pendulum
- undathem
- undation theory
- undaturbidite
- undecomposed
- undeformed
- under consideration by
- under preparation
- under taxation
- under-clay
- under-corrected event
- under-earth
- under-migrated data
- under-saturation
- under... supervision
- underbelt
- underbreaking
- undercarriage
- undercast
- underclay
- undercliff
- underconsolidation
- undercooling
- undercurrent
- undercurrent dragging
- undercut
- undercut level
- undercut method
- undercut slope
- undercutting
- undercutting coal face
- undercutting drilling chamber