13-letter words containing r, h, d, n, a
- cyberchondria — unfounded anxiety concerning the state of one's health brought on by visiting health and medical websites
- cylinder head — the detachable metal casting that fits onto the top of a cylinder block. In an engine it contains part of the combustion chamber and in an overhead-valve four-stroke engine it houses the valves and their operating mechanisms
- dance therapy — the use of dance or movement for therapeutic purposes; a form of therapy in which people are encouraged to express their feelings through dance or movement.
- danish pastry — Danish pastries are cakes made from sweet pastry. They are often filled with things such as apple or almond paste.
- das rheingold — an opera by Wagner (1869), one of four in a cycle based on the German myth of the Ring of the Nibelung
- death warrant — A death warrant is an official document which orders that someone is to be executed as a punishment for a crime.
- dechorionated — (biology) From which the chorion has been removed.
- dehydrogenase — an enzyme, such as any of the respiratory enzymes, that activates oxidation-reduction reactions by transferring hydrogen from substrate to acceptor
- dehydrogenate — to remove hydrogen from
- demochristian — a member or supporter of a Christian democratic party or movement
- dendrophagous — feeding on the wood of trees, as certain insects.
- diaphanometer — an instrument used to measure transparency, esp of the atmosphere
- diathermanous — the property of transmitting heat as electromagnetic radiation.
- disenthralled — to free from bondage; liberate: to be disenthralled from morbid fantasies.
- disfranchised — Simple past tense and past participle of disfranchise.
- disfranchises — Third-person singular simple present indicative form of disfranchise.
- disharmonious — inharmonious; discordant.
- disharmonized — Simple past tense and past participle of disharmonize.
- disheartening — to depress the hope, courage, or spirits of; discourage.
- dishonourable — showing lack of honor or integrity; ignoble; base; disgraceful; shameful: Cheating is dishonorable.
- dishonourably — (British) alternative spelling of dishonorably.
- disinthralled — freed from thraldom
- dodecahedrane — (organic compound) One of the Platonic hydrocarbons, C20H20, having the carbon atoms at the vertices of a regular dodecahedron.
- dodecahedrons — Plural form of dodecahedron.
- dolichocranic — dolichocephalic.
- dolphinariums — Plural form of dolphinarium.
- 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.
- donald cherry — Donald Eugene ("Don") 1936–95, U.S. jazz trumpeter.
- 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.
- downheartedly — In a downhearted manner.
- downhill race — a competitive event in which skiers are timed in a downhill run
- draftsmanship — a person employed in making mechanical drawings, as of machines, structures, etc.
- dragon's head — any of several mints of the genus Dracocephalum having spikes of double-lipped flowers.
- draughtswoman — Alternative spelling of draftswoman.
- draw the line — a mark or stroke long in proportion to its breadth, made with a pen, pencil, tool, etc., on a surface: a line down the middle of the page.
- dresden china — porcelain ware produced at Meissen, Germany, near Dresden, after 1710.
- drink to that — People say 'I'll drink to that' to show that they agree with and approve of something that someone has just said.
- driving chain — a roller chain that transmits power from one toothed wheel to another
- dual monarchy — the kingdom of Austria-Hungary 1867–1918.
- dun laoghaire — a seaport in E Republic of Ireland, near Dublin.
- dysmenorrheal — painful menstruation.
- dysmenorrhoea — painful menstruation.
- eastern hindi — the vernacular of the eastern half of the Hindi-speaking area in India.
- edging shears — shears that are used to trim the edges of a lawn
- elephantbirds — Plural form of elephantbird.
- enchondromata — Plural form of enchondroma.
- endobronchial — (anatomy) Pertaining to the lining of the bronchi.
- faint-hearted — lacking courage; cowardly; timorous.