doctor-fish
— Noun
– English
～ surgeon fish of the West Indies
Dewar flask
— Noun
– English
～ vacuum flask that holds liquid air or helium for scientific experiments
double flat
— Noun
– English
～ a musical notation of two flats in front of a note indicating that it is to be lowered by two semitones
devil's flax
— Noun
– English
～ common European perennial having showy yellow and orange flowers; a naturalized weed in North America
dog flea
— Noun
– English
～ flea that attacks dogs and cats
daisy fleabane
— Noun
– English
～ widely naturalized white-flowered North American herb
domestic flight
— Noun
– English
～ a flight that begins and ends in the same country
direct flight
— Noun
– English
～ a flight with one or more intermediate stops but no change of aircraft
dance floor
— Noun
– English
～ a bare floor polished for dancing
Dutch florin
— Noun
– English
～ formerly the basic unit of money in the Netherlands; equal to 100 cents
dental floss
— Noun
– English
～ a soft thread for cleaning the spaces between the teeth
dwarf flowering almond
— Noun
– English
～ small Chinese shrub with smooth unfurrowed dark red fruit grown especially for its red or pink or white flowers
digestive fluid
— Noun
– English
～ secretions that aid digestion
drilling fluid
— Noun
– English
～ a mixture of clays and chemicals and water; pumped down the drill pipe to lubricate and cool the drilling bit and to flush out the cuttings and to strengthen the sides of the hole
dobson fly
— Noun
– English
～ large soft-bodied insect having long slender mandibles in the male; aquatic larvae often used as bait
deer fly fever
— Noun
– English
～ a highly infectious disease of rodents (especially rabbits and squirrels) and sometimes transmitted to humans by ticks or flies or by handling infected animals
dry fly
— Noun
– English
～ a fly (fisherman's lure) that skims the surface of the water
Distinguished Flying Cross
— Noun
– English
～ a United States Air Force decoration for heroism while participating in an aerial flight
devil's food
— Noun
– English
～ very dark chocolate cake