D

dagObjectCompare
dagPose
dataStructure
date
dbcount
dbfootprint
dbmessage
dbpeek
dbtrace
defaultLightListCheckBox
defaultNavigation
defineDataServer
defineVirtualDevice
deformableShape
deformer
deformerEvaluator
deformerWeights
deg_to_rad
delete
deleteAllContainers 
deleteAttr
deleteAttrPattern
deleteExtension
deleteShadingGroupsAndMaterials 
deleteShelfTab 
deleteUI
deleteUnusedBrushes 
delrandstr
deltaMush
destroyLayout 
detachCurve
detachDeviceAttr
detachSurface
deviceEditor
deviceManager
devicePanel
dgdirty
dgeval
dgfilter
dgInfo
dgmodified
dgtimer
dgValidateCurve
dimWhen
directionalLight
directKeyCtx
dirmap
dirname 
disable
disableIncorrectNameWarning
disconnectAttr
disconnectJoint
diskCache
displacementToPoly
displayAffected
displayColor
displayCull
displayLevelOfDetail
displayPref
displayRGBColor
displaySmoothness
displayStats
displayString
displayStyle 
displaySurface
distanceDimContext
distanceDimension
doBlur
dockControl
dolly
dollyCtx
dopeSheetEditor
doPublishNode 
dot
dotProduct 
doubleProfileBirailSurface
drag
dragAttrContext
draggerContext
dropoffLocator
duplicate
duplicateCurve
duplicateSurface
dynamicLoad
dynExport
dynGlobals
dynPaintEditor
dynParticleCtx

MEL のスクリプトを示します