- dichlorosbenzene
- dicyclic
- die head
- die swell
- dielectric break
- dielectric heating
- dielectric medium
- dielectric strength
- diene
- diesel
- diesel index
- diethene
- diethyl
- diethylenediamine
- differential aeration
- differential coefficient
- differential compaction
- differential extraction
- differential process
- differential separation
- depreciation
- depreciation provision
- depressant
- depression contour
- depropanization
- depropanizing process
- depth curve
- depth point
- derrick brace
- derrick crown
- derrick grillage
- derrick man
- derrin
- desand
- descending solution
- desiccant
- designation number
- desilication
- desilver
- desquamation
- destearinate
- destraction
- desugar
- detainning
- detergent wax
- detersive
- deuteride
- developed heat
- development
- development stage
- development well
- deviated well
- dewar vessel
- dewaxed oil
- dezincification
- diagonal coast
- diagrammatic
- dialin
- dialkene
- diallylphthalate
- diametric system
- diaminodiphenylmethane
- diamond black
- diamond drill
- diaphragm
- diaphragm cell
- diaphragm gate
- diaphragm valve
- diapir structure
- diarsenate
- diasporite
- diastase
- diastem
- diatomaceous earth
- diatomaceous shale
- diatomite
- dichloride
- dichloroacetone
- dicyanoaurate
- diethylether
- differential flotation
- diffusion annealing
- diffusion barrier
- diffusion cell
- diglycidyl ether
- dihexyl
- dihydrobenzene
- dihydrodiketonaphthalene
- dihydroergotamine
- dihydronaphthalene
- dihydrostreptomycin
- dihydrotachysterol
- dihydrothiazole
- dihydroxyacetone
- dihydroxypurine
- diiodomethane
- diisopropylidene acetone
- dike swarm
- dill oil
- diluent