18-letter words containing r, o, t, h, l, d
- modular arithmetic — arithmetic in which numbers that are congruent modulo a given number are treated as the same. Compare congruence (def 2), modulo, modulus (def 2b).
- monophosphorylated — (biochemistry) phosphorylated with a single unit of phosphoric acid.
- monte carlo method — a technique for numerically approximating the solution of a mathematical problem by studying the distribution of some random variable, often generated by a computer.
- muscular dystrophy — a hereditary disease characterized by gradual wasting of the muscles with replacement by scar tissue and fat, sometimes also affecting the heart.
- old curiosity shop — a novel (1840–41) by Dickens.
- on the danger list — critically ill in hospital
- one's heart bleeds — used to express sympathetic grief, but often used ironically
- orthophthalic acid — Chemistry. any of three isomeric acids having the formula C 8 H 6 O 4 , especially the ortho isomer (orthophthalic acid) a colorless, crystalline, slightly water-soluble solid used chiefly in the manufacture of dyes, medicine, and perfume.
- parathyroid glands — any of several small oval glands usually lying near or embedded in the thyroid gland.
- peter and the wolf — a composition by Sergei Prokofiev written in 1936. It is a children's story with both music and text, spoken by a narrator accompanied by the orchestra
- phantom withdrawal — the unauthorized removal of funds from a bank account using an automated teller machine
- phosphatidylserine — any of a class of phospholipids occurring in biological membranes and fats
- planned parenthood — an organization that gives out information on the planning of the number and spacing of the births of one's children, as through the use of birth-control measures
- positively charged — having a positive charge
- potassium chloride — a white or colorless, crystalline, water-soluble solid, KCl, used chiefly in the manufacture of fertilizers and mineral water, and as a source of other potassium compounds.
- random walk theory — the theory that the future movement of share prices does not reflect past movements and therefore will not follow a discernible pattern
- residential school — (in Canada) a boarding school maintained by the Canadian government for Indian and Inuit children from sparsely populated settlements
- return to the fold — come back home
- rhode island white — one of a dual-purpose American breed of chickens having white feathers and a rose comb.
- rub shoulders with — to mix with socially or associate with
- september holidays — a period of time in September when people do not have to go to school, college or work
- sheltered workshop — a place of employment for persons with disabilities where their rights are protected and their needs are met.
- shop till you drop — If you shop till you drop, you do a large amount of shopping.
- short-tailed shrew — a grayish-black shrew, Blarina brevicauda, common in eastern North America, that has a tail less than half the length of the body.
- sindbad the sailor — (in The Arabian Nights' Entertainments), a wealthy citizen of Baghdad who relates the adventures of his seven wonderful voyages.
- spotted flycatcher — a European woodland songbird, Muscicapa striata, with a greyish-brown streaked plumage: family Muscicapidae (Old World flycatchers)
- stockholm syndrome — an emotional attachment to a captor formed by a hostage as a result of continuous stress, dependence, and a need to cooperate for survival.
- strathclyde region — a former local government region in W Scotland: formed in 1975 from Glasgow, Renfrewshire, Lanarkshire, Buteshire, Dunbartonshire, and parts of Argyllshire, Ayrshire, and Stirlingshire; replaced in 1996 by the council areas of Glasgow, Renfrewshire, East Renfrewshire, Inverclyde, North Lanarkshire, South Lanarkshire, Argyll and Bute, East Dunbartonshire, West Dunbartonshire, North Ayrshire, South Ayrshire, and East Ayrshire
- the bird has flown — the person in question has fled or escaped
- the first sea lord — the senior of the two serving naval officers who sits on the admiralty board of the Ministry of Defence
- the grand national — an annual steeplechase run at Aintree, Liverpool, since 1839
- the hotel industry — the branch of the services industry which provides hotels
- the lords temporal — (in Britain) peers other than bishops in their capacity as members of the House of Lords
- the same old story — the familiar or regular course of events
- theodore gericault — (Jean Louis André) Théodore [zhahn lwee ahn-drey tey-aw-dawr] /ʒɑ̃ lwi ɑ̃ˈdreɪ teɪ ɔˈdɔr/ (Show IPA), 1791–1824, French painter.
- theodore roosevelt — (Anna) Eleanor, 1884–1962, U.S. diplomat, author, and lecturer (wife of Franklin Delano Roosevelt).
- think the world of — the earth or globe, considered as a planet.
- thiosulphuric acid — an unstable acid known only in solutions and in the form of its salts. Formula: H2S2O3
- three-body problem — the problem of calculating the motions of three bodies in space moving under the influence of only their mutual gravitational attraction.
- to a grinding halt — If you describe a bad situation as grinding, you mean it never gets better, changes, or ends.
- to clear the decks — If you clear the decks, you get ready to start something new by finishing any work that has to be done or getting rid of any problems that are in the way.
- to hold your peace — If you hold or keep your peace, you do not speak, even though there is something you want or ought to say.
- transit theodolite — a theodolite having a telescope that can be transited.
- ur of the chaldees — the city where Abraham was born, sometimes identified with the Sumerian city of Ur. Gen. 11:28, 31; 15:7; Neh. 9:7.
- withdrawal symptom — effects of stopping a drug
- woman of the world — a woman experienced and sophisticated in the ways and manners of the world, especially the world of society.