duodenum.noun,.plural.duodena.or.duodenums
the beginning portion of the small intestine, starting at the lower end of the stomach and extending to the jejunum
duodenal.adjective

diploblastic.adjective
derived from two embryonic.germ.layers, the ectoderm and the endoderm; used of lower invertebrates, such as sponges and coelenterates

duh.interjection
the sound of what a person might say when he doesn't comprehend what's happening; used to say that what someone else has just said or asked is stupid; used to express stupidity when speaking of something done by someone who should have had the brains to know better (the example of ancient Jehoshaphat's funny attempt at shipbuilding, the result of which others might say 'like duh!'); used derisively to indicate that something just stated is all too obvious or self-evident

doze, dozed, dozing, dozes.verbs
intransitive verb use.to sleep lightly and intermittently
transitive verb use.to spend time dozing or as if dozing (dozed the summer away on her first holiday in years)
doze.noun,.plural.dozes
a short, light sleep
doze off.phrasal verb
to fall into a light sleep
dozer.noun,.plural.dozers

deciduous.adjective
falling off or shed at a specific season or stage of growth (deciduous antlers; deciduous leaves; deciduous teeth); shedding or losing foliage at the end of the growing season (deciduous trees such as elm, oak, sycamore {also spelt sycomore}); not lasting; ephemeral
deciduously.adverb
deciduousness.noun

decommission, decommissioned, decommissioning, decommissions.transitive verbs
to withdraw a ship for example, from active service; to remove from being commissioned

diary.noun,.plural.diaries
a daily record of events, experiences and observations; a journal; a book for use in keeping a personal record, as of experiences

delicious.adjective
highly pleasing or agreeable to the senses, especially of taste or smell; very pleasant; delightful (a delicious meal in every way)
deliciously.adverb
deliciousness.noun

dash, dashed, dashing, dashes.verbs
transitive verb use.if a person or an event dashes someone's hopes or expectations, it destroys them by hindering or making it difficult to impossible that the thing that is hoped for or expected will ever happen; to hurl, knock or thrust with sudden.energy; to break or smash by striking.violently; to perform or complete.hastily (dash off a letter; dash down a glass of juice); to add an enlivening or altering.element to; to.affect by adding another element or ingredient to (ice cream that was dashed with rum); to destroy or wreck (our memories were dashed when the vessel was decommissioned)
transitive verb use.to strike violently; smash; to move with haste; rush (dashed to the door); if you say that you have to dash, you mean that you are in a hurry and have to leave immediately
dash.noun,.plural.dashes
a swift, violent blow or stroke (accidentally knocked the glass of juice off the table with an impatient dash of his hand; a small amount of an added ingredient (a dash of his spice combination); a quick stroke, as with a pencil or brush; a sudden movement; a rush (made a dash for the washroom); in sports, a footrace, usually less than a quarter-mile long, run at top speed from the outset; a punctuation mark ( - ) used in writing and printing; in Morse code, the long sound or signal used in combination with the dot and silent intervals to represent letters or numbers; a  dashboard in a vehicle or the dashboard, the main selection screen of a program on a computer

department.noun,.plural.departments
a distinct, usually.specialized.division of a large organization (a principal.administrative division as of say, a city government (the fire department; the department of public works; department of roads; personnel department; the physics department in the university); a section of a department store selling a particular line of merchandise 9the home furnishings department; one of the principal executive divisions of a federal government headed by a cabinet officer; an area of particular knowledge or responsibility; a specialty (getting the kids to bed by between 7-8pm is my department)
departmental.adjective
departmentally.adverb
departmentalize, departmentalized, departmentalizing, departmentalizes.transitive verbs
to think and plan the organizing into departments
departmentalization.noun,.plural.departmentalizations

department store.noun,.plural.department stores
a large retail store offering a variety of merchandise and services and organized in separate departments

deport, deported, deporting, deports.transitive verbs
to behave or conduct oneself in a given.manner; comport
deportment.noun,.plural.deportments
a manner of personal conduct; behavior

deport, deported, deporting, deports.transitive verbs
to expel from a country; banish
deportable.adjective
subject to deportation (a deportable alien); punishable by deportation (a deportable offense)
deportation.noun,.plural.deportations
the act or an instance of deporting; expulsion of an undesirable alien from a country
deportee.noun,.plural.deportees
a deported person

dwarf.noun,.plural.dwarfs.or.dwarves
an unusually small person, often having limbs and features formed differently than those of average height; a dwarf star; a dwarf tree; dwarf shrubbery
dwarf, dwarfed, dwarfing, dwarfs.verbs
transitive verb use.to check the natural growth or development of; stunt (the plants were dwarfing due to the hot weather); to cause to appear small by comparison (the people of the Middle Ages were of dwarf size compared to the giants of old)
intransitive verb use.to become stunted or grow smaller
dwarfish.adjective
dwarfishness.noun

dais.noun, pronounced 'day is'
a raised platform as in a lecture hall for speakers or honored guests

dethrone, dethroned, dethroning, dethrones.transitive verbs
to remove from the throne; depose; to remove from a prominent or powerful position
dethronement.noun

disease.noun,.plural.diseases
a pathological.condition of a part, an organ or a system of an organism.resulting from various.causes, such as.infection, genetic.defect or environmental.stress and characterized by an identifiable.group of signs or symptoms; a condition or tendency, as of society, regarded as abnormal and harmful;(it's a disease upon society that is careless about cleanliness); lack of ease; trouble (due to her being.nervous lack of knowledge about public speaking, she experiences.dis-ease when she has to speak in front of a group)
diseased.adjective
affected with disease; unsound or disordered

dampen, dampened, dampening, dampens.verbs
transitive verb use.to make damp; if you dampen something, you make it slightly wet; to dampen something down means the same as to dampen it; to deaden, restrain or depress; to dampen something such as someone's enthusiasm or excitement means to make it less lively and/or intense; to soundproof
intransitive verb use.to become damp
dampener.noun,.plural.dampeners
damp, damper, dampest.adjectives
slightly wet; dejected
damp.noun
moisture in the air; humidity; lowness of spirits; depression; a restraint or check; a discouragement
damp, damped, damping, damps.transitive verbs
to make damp or moist; moisten; to extinguish a fire, for example, by cutting off air; to restrain or check; discourage Music:.to provide the strings of a keyboard instrument with dampers as a means of reducing the dynamic.level
Physics:.in physics, to decrease the amplitude of a wave, such as a sound wave
dampish.adjective
damply.adverb
dampness.noun
outside today one can feel the dampness in the air
damper.noun,.plural.dampers
one that deadens, restrains or depresses (rain put a damper on our picnic plans); an adjustable plate, as in the flue of a furnace or stove, for controlling the draft
Music:.a device in various keyboard instruments for deadening the vibrations of the strings; a mute for various brass instruments; a device that eliminates or progressively.diminishes.vibrations or oscillations, as of a magnetic needle