Tree terms: d
- DAC
 - damage to trees
 - damages
 - damping
 - damp-proof course
 - dangerous climate change
 - dark-sky reserve
 - daylight
 - daylighting test
 - dB
 - dB (A)
 - de minimis
 - DEA
 - dead hedge
 - dead wood
 - dead wood (habitat)
 - deadman system
 - deadwood (tree crown)
 - death watch beetle (Xestobium spp.)
 - de-bark
 - debt collection agency
 - decay
 - decay (external signs in trees)
 - decibel
 - deciduous
 - decision notice
 - decline
 - decompaction
 - decomposers
 - decomposition
 - deer
 - deer damage
 - deer fence
 - deer forest
 - deer lawn
 - deer park
 - defect
 - defendant
 - deficiency
 - definitive map
 - deforestation
 - deformity
 - DEFRA
 - degree
 - degree-days
 - dehiscence
 - de-icing salt
 - delamination
 - delegated legislation
 - delegated powers
 - demarcation line
 - Demec strain gauge
 - demographic momentum
 - dendrochronology
 - dendrology
 - denehole
 - denn
 - Densitomat
 - density
 - dentate block paver
 - Department for Environment, Food and Rural Affairs
 - derelict
 - derelict hedge
 - derelict land
 - derelict orchard
 - derelict woodland
 - derris
 - desertification
 - desiccate
 - design and access statement
 - design freeze
 - desire line
 - dessert variety
 - destructive distillation
 - detention basin
 - developable area
 - development
 - development plan
 - development plan documents
 - devil’s ears
 - dew
 - dew point
 - dew pond
 - diameter
 - diameter at breast height
 - diameter tape
 - diametral crack
 - dibble
 - Dicotyledoneae
 - die-back
 - differential settlement
 - differentiation
 - diffuse light
 - diffuse porous
 - diffusion
 - dilatancy
 - Diocesan Advisory Committee
 - dioecious
 - diploid
 - direct light
 - direct seeding (direct sowing)
 - directional drilling
 - disclaimer
 - discoloured wood
 - disease
 - dismantle
 - disorder
 - displacement (by trees)
 - distal
 - distillation
 - distortion survey
 - distressed
 - district
 - district judge
 - District registry
 - diurnal
 - diversity (landscape)
 - diversity (wildlife)
 - Divisional court
 - dog damage
 - domestic energy assessor
 - domestica
 - dominant
 - doorstep green
 - dormancy, dormant
 - dormant bud
 - dormer
 - dormouse
 - double working
 - double-sided open-board fence
 - down
 - downy willow
 - DPD
 - drag coefficient
 - drain
 - drain cover
 - drain rooter
 - drain run
 - drain survey
 - drainage
 - dressing
 - drift
 - drift (biocide)
 - drip-line
 - drive-all
 - drop kerb
 - dropper fence
 - drought
 - drought avoidance
 - drought crack
 - drought stress
 - drought tolerance
 - drupe
 - dry jointed
 - dry rot
 - DTp 1
 - DTp 2
 - dual drainage
 - dual-purpose variety
 - ductile failure
 - durable
 - Durban
 - durmast oak
 - Dutch cut
 - Dutch elm disease
 - Dutch elm disease (resistance)
 - duty of care
 - dwarf
 - dwarf Japanese knotweed (Fallopia japonica var. compacta)
 - dwarf shrub
 - dwarfing rootstock
 - dyke
 - dynamic behaviour