Word Unit: doul-, dulo-, dul- (Greek: slave, servile, slavish; servitude; serving)
Word Unit: dox-, -doxy, dog-, dogma-, dogmato- (Greek: believe, belief; that which is thought to be true by someone who has the power or right to give orders, make decisions, and to enforce his or her opinions, doctrines, praise, or beliefs)

Cross references of word families that are related directly, or indirectly, to: "faith, trust; faithful, trusting; believe, belief": cred-; fid-.

Word Unit: draco-, drac- + (Greek > Latin: dragon; a kind of serpent; snake; a kind of fish; by extension, a festering sore)
Word Unit: Dracunculiasis or Guinea worm infestation ("affliction with little dragons" or "empty granary")

A cross reference of other word family units that are related directly, or indirectly, with: "insects, bugs, worms; invertebrates": aphidi-; api-; ascari-; culci-; Dung Beetle Survival; Dung Beetles Important; Eating Worms; entomo-; formic-; helmintho-; insecto-; Insects: Importance; isopter-; larvi-; lepidopter-; meliss-; mosquito; Mosquito, other Languages; Mosquitoes, Pt. 1; Mosquitoes, Pt. 2; myrmeco-; scarab; scoleco-; sphec-; taeni-; termit-; vermo-.

Word Unit: drama- (Greek > Late Latin: to do, to accomplish)
Word Unit: drepano-, drepan- + (Greek: sickle)
Word Unit: dromo-, drom-, -drome, -dromic, -dromical, -dromous (Greek: running, course; race, racecourse)
Word Unit: droso-, dros- (Greek: dew)
Word Unit: dry-, dryo- + (Greek: oak tree; by extension, "tree")
Word Unit: duc-, -duce, -duct, -ducent, -ductor, -duction, -ductive, -ducer, -ducement, -ducation (Latin: to lead, leading; bringing; to take; to draw along or out)

Cross references of word families related to "bear, carry, bring": -fer; ger-; later-, -lation; phoro-; port-.

A cross reference of word units that are related, directly and/or indirectly, with "tube, pipe": aulo-; can-, cann-; fistul-; siphon-; syringo-; tub-.

Word Unit: dulci-, dulc- (Latin: sweet, pleasant, charming)
Word Unit: Dung Beetle Survival Is Essential for the Survival of All Living Creatures (Animal health and dung beetle health: they are both vital)

A cross reference of other word family units that are related directly, or indirectly, with: "insects, bugs, worms; invertebrates": aphidi-; api-; ascari-; culci-; Dung Beetles Important; Eating Worms; entomo-; formic-; Guinea worms; helmintho-; insecto-; Insects: Importance; isopter-; larvi-; lepidopter-; meliss-; mosquito; Mosquito, other Languages; Mosquitoes, Pt. 1; Mosquitoes, Pt. 2; myrmeco-; scarab; scoleco-; sphec-; taeni-; termit-; vermo-.

Word Unit: Dung Beetles Are Very Important for Pasture Ecosystems (without dung beetles, the earth would be one big sphere of dung)

A cross reference of other word family units that are related directly, or indirectly, with: "insects, bugs, worms; invertebrates": aphidi-; api-; ascari-; culci-; Dung Beetle Survival; Eating Worms; entomo-; formic-; Guinea worms; helmintho-; insecto-; Insects: Importance; isopter-; larvi-; lepidopter-; meliss-; mosquito; Mosquito, other Languages; Mosquitoes, Pt. 1; Mosquitoes, Pt. 2; myrmeco-; scarab; scoleco-; sphec-; taeni-; termit-; vermo-.

Word Unit: duo-, du- (Latin: two, double; a word element for the number "2")
Word Unit: duodecim-, duodec- (Latin: twelve)
Word Unit: duodeno-, duoden- (Latin: first part of the small intestine; based on duodecim, "twelve", because its length is approximately twelve finger-breadths)
Word Unit: duro-, dur-, dura- (Latin: hard [as wood], lasting; thick, tough)
Word Unit: dyna-, dyn-, dynamo-, -dyne, -dynamia, -dynamic (Greek: power, strength, force, mightiness)
Word Unit: dys- (Greek: bad, harsh, wrong; ill; hard to do, difficult at; slow of; disordered; impaired, defective)

Inter-related cross references, directly or indirectly, involving word units meaning "bad, wrong": caco-, kako-; mal-; mis-; pessim-; sceler-.

Cross references directly, or indirectly, involving "slow, slowness, slow of, sluggish": lent-; tard-.

Word Unit: Earth, Words from the Myths (Gaia, Earth goddess of the ancient Greeks, she was called Gaea, Terra Mater, "Earth Mother" by the Romans; third planet from the sun)