13-letter words containing d, r
- domain theory — (theory) A branch of mathematics introduced by Dana Scott in 1970 as a mathematical theory of programming languages, and for nearly a quarter of a century developed almost exclusively in connection with denotational semantics in computer science. In denotational semantics of programming languages, the meaning of a program is taken to be an element of a domain. A domain is a mathematical structure consisting of a set of values (or "points") and an ordering relation, <= on those values. Domain theory is the study of such structures. ("<=" is written in LaTeX as \subseteq) Different domains correspond to the different types of object with which a program deals. In a language containing functions, we might have a domain X -> Y which is the set of functions from domain X to domain Y with the ordering f <= g iff for all x in X, f x <= g x. In the pure lambda-calculus all objects are functions or applications of functions to other functions. To represent the meaning of such programs, we must solve the recursive equation over domains, D = D -> D which states that domain D is (isomorphic to) some function space from D to itself. I.e. it is a fixed point D = F(D) for some operator F that takes a domain D to D -> D. The equivalent equation has no non-trivial solution in set theory. There are many definitions of domains, with different properties and suitable for different purposes. One commonly used definition is that of Scott domains, often simply called domains, which are omega-algebraic, consistently complete CPOs. There are domain-theoretic computational models in other branches of mathematics including dynamical systems, fractals, measure theory, integration theory, probability theory, and stochastic processes. See also abstract interpretation, bottom, pointed domain.
- dome fastener — a fastening device consisting of one part with a projecting knob that snaps into a hole on another like part, used esp in closures in clothing
- domiciliaries — of or relating to a domicile, or place of residence.
- domineeringly — In a domineering manner.
- domino theory — a theory that if one country is taken over by an expansionist, especially Communist, neighbor, party, or the like, the nearby nations will be taken over one after another.
- donald cherry — Donald Eugene ("Don") 1936–95, U.S. jazz trumpeter.
- donor country — a country which provides aid to a developing country
- doppelgangers — Plural form of doppelganger.
- doppler laser — a technique for measuring the shift in frequency between the source and reflected radiation of a laser.
- doppler radar — a radar tracking system that determines the velocity of a moving object by measuring the Doppler shift of the frequency of a radar signal reflected by the object.
- doppler shift — (often lowercase) the shift in frequency (Doppler shift) of acoustic or electromagnetic radiation emitted by a source moving relative to an observer as perceived by the observer: the shift is to higher frequencies when the source approaches and to lower frequencies when it recedes.
- dormer window — in sloping roof
- dorothy dixer — a parliamentary question asked by a member of the government so that the minister may give a prepared answer
- dos requester — (networking) An MS-DOS client that provides transparent redirection of printing and file accesses to a network server. It handles levels 3, 4 and 5 of the Open Systems Interconnect seven layer model. A DOS requester under Novell NetWare will interface to a network card driver with an ODI interface, and will be either a single executable (netx.exe) or a set of VLMs that are loaded on demand. In the IBM/Microsoft LAN Manager/SMB world, where the name DOS redirector is more common, there will be an NDIS interface driver and a net.exe executable.
- double boiler — a utensil consisting of two pots, one of which fits partway into the other: water is boiled in the lower pot to cook or warm food or melt a substance in the upper.
- double bridle — a bridle with four reins coming from a bit with two rings on each side
- double dagger — a mark (‡) used for references, as footnotes.
- double garage — a garage that can hold two vehicles
- double spread — any pair of facing pages in a completed book, magazine, etc.
- double-decker — something with two decks, tiers, or the like, as two beds one above the other, a ship with two decks above the water line, or a bus with two decks.
- double-dipper — Informal. to earn a salary from one position while collecting a pension from the same employer or organization, especially to be a wage earner on the federal payroll while receiving a military retiree's pension.
- double-figure — double-digit.
- double-header — Sports. two games, as of baseball, between the same teams on the same day in immediate succession. two games, as of basketball, between two different pairs of teams on the same day in immediate succession.
- double-ripper — bobsled (def 2).
- doublespeaker — a person who uses doublespeak
- down syndrome — Down syndrome is a disorder that some people are born with. People who have Down syndrome have physical differences, such as shorter stature, and learning difficulties.
- down the road — a long, narrow stretch with a smoothed or paved surface, made for traveling by motor vehicle, carriage, etc., between two or more points; street or highway.
- down to earth — practical and realistic: a down-to-earth person.
- down-to-earth — practical and realistic: a down-to-earth person.
- downconverter — A device that converts a signal to a lower frequency, especially in television reception.
- downers grove — a city in NE Illinois, near Chicago.
- downheartedly — In a downhearted manner.
- downhill race — a competitive event in which skiers are timed in a downhill run
- downregulates — Third-person singular simple present indicative form of downregulate.
- downrightness — The personal quality of being straightforward and direct in one's manner.
- downside risk — an estimate of the potential loss of value of an investment in a falling market
- draft version — a preliminary version
- drafting yard — a yard fenced into compartments for the holding and sorting of livestock.
- draftsmanship — a person employed in making mechanical drawings, as of machines, structures, etc.
- draftspersons — Plural form of draftsperson.
- drag and drop — A common method for manipulating files (and sometimes text) under a graphical user interface or WIMP environment. The user moves the pointer over an icon representing a file and presses a mouse button. He holds the button down while moving the pointer (dragging the file) to another place, usually a directory viewer or an icon for some application program, and then releases the button (dropping the file). The meaning of this action can often be modified by holding certain keys on the keyboard at the same time. Some systems also use this technique for objects other than files, e.g. portions of text in a word processor. The biggest problem with drag and drop is does it mean "copy" or "move"? The answer to this question is not intuitively evident, and there is no consensus for which is the right answer. The same vendor even makes it move in some cases and copy in others. Not being sure whether an operation is copy or move will cause you to check very often, perhaps every time if you need to be certain. Mistakes can be costly. People make mistakes all the time with drag and drop. Human computer interaction studies show a higher failure rate for such operations, but also a higher "forgiveness rate" (users think "silly me") than failures with commands (users think "stupid machine"). Overall, drag and drop took some 40 times longer to do than single-key commands.
- dragging-beam — (in a hipped roof) a short beam holding the foot of a hip rafter to counteract its thrust.
- draggletailed — untidy; bedraggled; slovenly.
- dragon lizard — Komodo dragon.
- dragon market — any of the emerging markets of the Pacific rim, esp Indonesia, Malaysia, Thailand, and the Philippines
- dragon's head — any of several mints of the genus Dracocephalum having spikes of double-lipped flowers.
- dragon's tail — (formerly) the descending node of the moon or a planet.
- drainage tube — a tube that drains fluid from an incision or body cavity during surgery
- drainage wind — Meteorology. gravity wind.
- drake passage — a strait between S South America and the South Shetland Islands, connecting the Atlantic and Pacific oceans.