Dactyl
Finger (polydactyl)
Decid-
To cut off (deciduous)
Dendr-
Tree (dendrite)
Dent-, dunt
Tooth (denture)
Derm-
Skin (epidermis)
Dextra-
Right (dexterity)
Di-
Two (dihybrid)
Dia-
Through, access (diameter)
Dict-
Speak (dictionary)
Diplo-
Double (diploid)
Dis-
Apart, away, reverse (dissolve)
Dorso-
Back (dorsal)
Duct
Channel, leader (oviduct)
Dyn-
Power (dynamic)
Dynamo
Power, force (dynamic)
E-
Out (evolution)
Echino-
Spiny (echinoderm)
Eco-
House (ecology)
Ecto-
Outer (ectoderm)
Ectomy
Removal (appendectomy)