20-letter words containing a, t, h, e, o, l
- computability theory — (mathematics) The area of theoretical computer science concerning what problems can be solved by any computer. A function is computable if an algorithm can be implemented which will give the correct output for any valid input. Since computer programs are countable but real numbers are not, it follows that there must exist real numbers that cannot be calculated by any program. Unfortunately, by definition, there isn't an easy way of describing any of them! In fact, there are many tasks (not just calculating real numbers) that computers cannot perform. The most well-known is the halting problem, the busy beaver problem is less famous but just as fascinating.
- craniosacral therapy — a form of therapy for various disorders in which the therapist manipulates the bones of the skull
- de la madrid hurtado — Miguel [mee-gel] /miˈgɛl/ (Show IPA), 1934–2012, Mexican political leader: president 1982–88.
- death of ivan ilyich — a short novel (1884) by Leo Tolstoy.
- decahydronaphthalene — a colorless, aromatic liquid, C 10 H 18 , insoluble in water and soluble in alcohol and ether: used as a solvent for oils, fats, etc., in cleaning fluids, lubricants, etc.
- deontological ethics — the branch of ethics dealing with right action and the nature of duty, without regard to the goodness or value of motives or the desirability of the ends of any act.
- department of health — government ministry for health matters
- dialectical theology — a form of neoorthodox theology emphasizing the infinite tensions, paradoxes, and basic ambiguities inherent in Christian existence, and holding, against rationalism, that God is unknowable to humans except through divine grace and revelation.
- dichloroethyl formal — a colorless liquid, C 5 H 10 O 2 Cl 2 , used chiefly as a solvent and in the manufacture of certain synthetic rubbers.
- differential housing — the casing that houses the differential of a motor vehicle
- diisobutyl phthalate — a clear, colorless liquid, C 14 H 26 O 4 , used chiefly as a plasticizer for nitrocellulose.
- diophantine analysis — any of several methods for finding integral solutions for equations with more than one variable whose coefficients are integers.
- discounted cash flow — a technique for appraising an investment that takes into account the different values of future returns according to when they will be received
- distribution channel — trade: retailer
- domestic heating oil — a liquid petroleum product used to fuel residential building furnaces or boilers
- double-aspect theory — a monistic theory that holds that mind and body are not distinct substances but merely different aspects of a single substance
- electrocardiographic — Of or pertaining to an electrocardiogram (ECG) or electrocardiograph.
- electroencephalogram — A test or record of brain activity produced by electroencephalography.
- electrohydrodynamics — (physics) the study of the dynamics of electrically conducting fluid.
- electrophysiological — Of or pertaining to electrophysiology.
- electroshock therapy — a form of shock therapy in which electric current is applied to the brain
- elephant in the room — an obvious truth deliberately ignored by all parties in a situation
- elizabeth of hungary — Saint. 1207–31, Hungarian princess who devoted herself to charity and asceticism. Feast day: Nov 17 and 19
- environmental health — the issues dealt with by the Environmental Health Department of a local authority, such as prevention of the spread of communicable diseases, food safety and hygiene, control of infestation by insects or rodents, etc
- father of the chapel — (in British trade unions in the publishing and printing industries) a shop steward
- fermentation alcohol — alcohol (def 1).
- fermentation-alcohol — Also called ethyl alcohol, grain alcohol, ethanol, fermentation alcohol. a colorless, limpid, volatile, flammable, water-miscible liquid, C 2 H 5 OH, having an etherlike odor and pungent, burning taste, the intoxicating principle of fermented liquors, produced by yeast fermentation of certain carbohydrates, as grains, molasses, starch, or sugar, or obtained synthetically by hydration of ethylene or as a by-product of certain hydrocarbon syntheses: used chiefly as a solvent in the extraction of specific substances, in beverages, medicines, organic synthesis, lotions, tonics, colognes, rubbing compounds, as an automobile radiator antifreeze, and as a rocket fuel. Compare denatured alcohol, methyl alcohol.
- flavour of the month — If you think that something or someone is very popular at a particular time, you can say that they are flavour of the month.
- flight data recorder — a recording device that records relevant data during an aircraft's flight
- florence nightingale — Florence ("the Lady with the Lamp") 1820–1910, English nurse: reformer of hospital conditions and procedures; reorganizer of nurse's training programs.
- fold-and-thrust belt — a linear or arcuate region of the earth's surface that has been subjected to severe folding and thrust faulting
- fontainebleau school — a group of artists, many of them Italian and Flemish, who worked on the decorations of the palace of Fontainebleau in the 16th century.
- for all one is worth — good or important enough to justify (what is specified): advice worth taking; a place worth visiting.
- forty-ninth parallel — an informal name for the Canadian border with the USA, which is in part delineated by the parallel line of latitude at 49°N
- fourth international — a loose federation of small groups of radical socialists formed in 1936 under the leadership of Leon Trotsky and hostile to the Soviet Union. Compare international (def 6).
- full to the gunwales — completely full; full to overflowing
- generative phonology — a theory of phonology that uses a set of rules to derive phonetic representations from abstract underlying forms.
- get ahold of oneself — If you get ahold of yourself, you force yourself to become calm and sensible after a shock or in a difficult situation.
- get one's hackles up — to become tense with anger; bristle
- glucosamine sulphate — a compound used in some herbal remedies and dietary supplements, esp to strengthen joint cartilage
- go like the clappers — to move extremely fast
- grade school teacher — a teacher in a grade school
- graphics accelerator — (graphics, hardware) Hardware (often an extra circuit board) to perform tasks such as plotting lines and surfaces in two or three dimensions, filling, shading and hidden line removal.
- hail-fellow-well-met — friendly but insincere
- hampton court palace — a royal palace in Hampton, London, built in 1515 by Cardinal Wolsey
- he's no oil painting — he is not good-looking
- health questionnaire — A health questionnaire is a list of questions about someone's health issued by underwriters before accepting a person as a risk.
- helicopter parenting — a style of child rearing in which an overprotective mother or father discourages a child's independence by being too involved in the child's life: In typical helicopter parenting, a mother or father swoops in at any sign of challenge or discomfort.
- helmeted guinea fowl — the common guinea fowl in its wild state.
- heston and isleworth — a former borough, now part of Hounslow, in SE England, near London.