21-letter words containing h, e, r, d, i, t

ground-effect machine — ACV (def 2).
guaranteed scheduling — (algorithm) A scheduling algorithm used in multitasking operating systems that guarantees fairness by monitoring the amount of CPU time spent by each user and allocating resources accordingly.
have the inside track — If you say that someone has the inside track, you mean that they have an advantage, for example special knowledge about something.
hierarchical database — (database) A kind of database management system that links records together like a family tree such that each record type has only one owner, e.g. an order is owned by only one customer. Hierarchical structures were widely used in the first mainframe database management systems. However, due to their restrictions, they often cannot be used to relate structures that exist in the real world.
higher-order function — (HOF) A function that can take one or more functions as argument and/or return a function as its value. E.g. map in (map f l) which returns the list of results of applying function f to each of the elements of list l. See also curried function.
hyperkinetic disorder — another name for attention deficit hyperactivity disorder (ADHD)
indicated horse-power — the horsepower of a reciprocating engine as shown by an indicator record. Abbreviation: ihp, IHP.
lambeth quadrilateral — the four essentials agreed upon at the Lambeth Conference of 1888 for a United Christian Church, namely, the Holy Scriptures, the Apostles' Creed, the sacraments of baptism and Holy Communion, and the historic episcopate
law of thermodynamics — any of three principles variously stated in equivalent forms, being the principle that the change of energy of a thermodynamic system is equal to the heat transferred minus the work done (first law of thermodynamics) the principle that no cyclic process is possible in which heat is absorbed from a reservoir at a single temperature and converted completely into mechanical work (second law of thermodynamics) and the principle that it is impossible to reduce the temperature of a system to absolute zero in a finite number of operations (third law of thermodynamics)
light armored vehicle — an eight-wheeled armored reconnaissance car with a 25mm cannon, in service with the U.S. Army and Marine Corps in the 1980s.
lordship of the isles — an overlordship of the Western Isles of Scotland and adjacent lands instituted in 1266 when Magnus of Norway ceded the Hebrides, the Isle of Man, and Kintyre to the King of Scotland, and claimed by the chiefs of Clan Dougall and later by those of Clan Donald. The title was forfeited to James IV in 1493 and is now held by the eldest son of the sovereign
lost in the underflow — (jargon) Too small to be worth considering; more specifically, small beyond the limits of accuracy or measurement. This is a reference to "floating point underflow". The Hacker's Jargon File claimed that it is also a pun on "undertow" (a kind of fast, cold current that sometimes runs just offshore and can be dangerous to swimmers). "Well, sure, photon pressure from the stadium lights alters the path of a thrown baseball, but that effect gets lost in the underflow". Compare epsilon, epsilon squared; see also overflow bit.
maidenhair spleenwort — an evergreen fern, Asplenium trichomanes, abundant in woody areas of the North Temperate Zone, having thickly clustered fronds.
maître d'hôtel butter — melted butter mixed with parsley and lemon juice
majority shareholding — a holding of more than half a company's shares
mauvais quart d'heure — a brief unpleasant experience
mechanical solidarity — social cohesiveness that is based on shared activities, beliefs, and experiences and is characteristic of simple traditional societies.
medium dry white wine — Medium dry white wine is white wine that is not very sweet.
member of the wedding — a novel (1946) and play (1950) by Carson McCullers.
metopon hydrochloride — a narcotic drug, C18H21O3N·HCl, derived from morphine, but slightly more potent: used in medicine to relieve pain
modern apprenticeship — an arrangement that allows a school leaver to gain vocational qualifications while being trained in a job
monochloroacetic acid — chloroacetic acid.
motherwell and wishaw — a burgh in the Motherwell district, in S Scotland.
near-death experience — A near-death experience is a strange experience that some people who have nearly died say they had when they were unconscious.
neither hide nor hair — nothing whatsoever
northumberland strait — the part of the Gulf of St. Lawrence that separates Prince Edward Island from New Brunswick and Nova Scotia, in SE Canada. About 200 miles (320 km) long; 9–30 miles (15–48 km) wide.
of time and the river — a novel (1935) by Thomas Wolfe.
old spanish practices — irregular practices among a group of workers to gain increased financial allowances, reduced working hours, etc
one thing and another — You can use the expression 'one thing and another' to suggest that there are several reasons for something or several items on a list, but you are not going to explain or mention them all.
ortho-dichlorobenzene — a colorless liquid with a pleasant odor, C 6 H 4 Cl 2 , used as a solvent for a wide range of organic materials.
pathfinder prospectus — a prospectus regarding the flotation of a new company that contains only sufficient details to test the market reaction
pipelined burst cache — Pipeline Burst Cache
populist shop steward — a shop steward who operates in a delegate role, putting the immediate interests of his members before union principles and policies
propantheline bromide — a substance, C 2 3 H 3 0 BrNO 3 , used in the treatment of peptic ulcers.
pseudohermaphroditism — an individual having internal reproductive organs of one sex and external sexual characteristics resembling those of the other sex or being ambiguous in nature. Compare hermaphrodite (def 1).
psychopathic disorder — (in England, according to the Mental Health Act 1983) a persistent disorder or disability of mind which results in abnormally aggressive or seriously irresponsible conduct on the part of the person concerned
purchasing department — the group of staff within an organization that is responsible for buying goods or products
put in the hard yards — to make a great effort to achieve an end
ralph roister doister — a play (1553?) by Nicholas Udall: the earliest known English comedy.
rayleigh distribution — (mathematics) A curve that yields a good approximation to the actual labour curves on software projects.
record of achievement — a statement of the personal and educational development of each pupil
right-angled triangle — a triangle one angle of which is a right angle
ring down the curtain — to lower the curtain at the end of a theatrical performance
ring-around-the-rosey — a children's game in which the players sing while going around in a circle and squat when the lyrics “all fall down” are sung.
rutherford scattering — the scattering of an alpha particle through a large angle with respect to the original direction of motion of the particle, caused by an atom (Rutherford atom) with most of the mass and all of the positive electric charge concentrated at a center or nucleus.
s-k reduction machine — An abstract machine defined by Professor David Turner to evaluate combinator expressions represented as binary graphs. Named after the two basic combinators, S and K.
satellite dish aerial — a parabolic aerial for reception from or transmission to an artificial satellite
school of the soldier — an institution where instruction is given, especially to persons under college age: The children are at school.
school superintendent — an official whose job is to oversee school administration within a district
scorched earth policy — a military practice of devastating the property and agriculture of an area before abandoning it to an advancing enemy.

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