dacitic - den
- decaying organic matter
- Decca
- Deccan traps
- deceleration
- decementation
- deceptive faulting
- dechenite
- decibar
- deciduous
- decimation
- decipher
- decipher complex structural relations
- deck charge
- decke
- deckenkarren
- deckhead building
- decking
- decking gear
- deckman
- declination
- declination compass
- declination needle
- declinator
- decline
- decline curve
- decline in lake level
- decline of a well
- decline of piesometric surface
- decline of water table
- decline period of water table
- decline with the depth
- declined
- declined graptolites
- declined with the depth
- declining compression
- declining stage
- declining with the depth
- declinometer
- declivious
- declivity