20-letter words containing o, h, r, i
- (right) off the reel — without hesitation or pause
- a drop in the bucket — an amount very small in relation to what is needed or desired
- a safe pair of hands — If you say that someone is or has a safe pair of hands, you mean that they are reliable and will not make any serious mistakes.
- a trick of the light — If you say that something is a trick of the light, you mean that what you are seeing is an effect caused by the way that the light falls on things, and does not really exist in the way that it appears.
- abreast of the times — up-to-date, as in ideas, fashions, etc.; modern
- acetylcholinesterase — an enzyme in nerve cells that is responsible for the destruction of acetylcholine and thus for switching off excitation of the nerve
- acetylmethylcarbinol — acetoin.
- admiral of the fleet — an officer of the highest rank in the Royal Navy, equivalent to field marshal
- adrenocorticotrophic — stimulating the adrenal cortex
- adrenocorticotrophin — (hormone) adrenocorticotropic hormone.
- africanized honeybee — killer bee.
- after the fashion of — like; similar to
- after-hours drinking — drinking in a pub after its legal closing time
- algorithmic language — ALGOL 60
- aluminum borohydride — a volatile liquid, Al(BH 4) 3 , that ignites spontaneously in air and reacts vigorously with water to form hydrogen, used chiefly in organic synthesis.
- amana church society — a Christian community in Iowa governed by elders, with no ordained clergy: founded in Germany in 1714, in America since 1843
- ammonium chrome alum — chrome alum (def 1).
- angoumois grain moth — a gelechiid moth, Sitotroga cerealella, the larvae of which feed on stored corn and other grains.
- anthemius of tralles — c474–c534, Greek mathematician and architect, active in Lydia.
- anthropomorphization — Endowing with human qualities.
- antiauthoritarianism — Opposition to authority; the quality of being antiauthoritarian.
- antidandruff shampoo — a shampoo that prevents or treats dandruff
- antidiuretic hormone — vasopressin. Abbreviation: ADH.
- antimony oxychloride — a white, water-insoluble powder, SbOCl, used chiefly in the manufacture of antimony salts.
- apollonius of rhodes — 3rd century bc, Greek epic poet and head of the Library of Alexandria. His principal work is the four-volume Argonautica
- apothecaries' weight — a system of weights, formerly used in pharmacy, based on the Troy ounce, which contains 480 grains. 1 grain is equal to 0.065 gram
- arches national park — a national park in E Utah: natural arch formations. 114 sq. mi. (295 sq. km).
- archiepiscopal cross — patriarchal cross.
- architectural bronze — a brass alloy of about 57 percent copper, 41 percent zinc, and 2 percent lead.
- aristarchus of samos — 3rd century bc, Greek astronomer who anticipated Copernicus in advancing the theory that the earth revolves around the sun
- artificial harmonics — harmonics of a note produced on a stringed instrument by lightly touching a stopped sounded string.
- at two hours' notice — with notification only two hours in advance
- atmospheric pressure — Atmospheric pressure is the pressure of the atmosphere on the Earth's surface.
- axiomatic set theory — (theory) One of several approaches to set theory, consisting of a formal language for talking about sets and a collection of axioms describing how they behave. There are many different axiomatisations for set theory. Each takes a slightly different approach to the problem of finding a theory that captures as much as possible of the intuitive idea of what a set is, while avoiding the paradoxes that result from accepting all of it, the most famous being Russell's paradox. The main source of trouble in naive set theory is the idea that you can specify a set by saying whether each object in the universe is in the "set" or not. Accordingly, the most important differences between different axiomatisations of set theory concern the restrictions they place on this idea (known as "comprehension"). NBG (von Neumann-Bernays-Goedel) set theory sort of allows comprehension for all formulae without restriction, but distinguishes between two kinds of set, so that the sets produced by applying comprehension are only second-class sets. NBG is exactly as powerful as ZF, in the sense that any statement that can be formalised in both theories is a theorem of ZF if and only if it is a theorem of ZFC. MK (Morse-Kelley) set theory is a strengthened version of NBG, with a simpler axiom system. It is strictly stronger than NBG, and it is possible that NBG might be consistent but MK inconsistent. ML ("Modern Logic") is to NF as NBG is to ZF. (Its name derives from the title of the book in which Quine introduced an early, defective, form of it). It is stronger than ZF (it can prove things that ZF can't), but if NF is consistent then ML is too.
- bacteriochlorophylls — Plural form of bacteriochlorophyll.
- baptism for the dead — the baptism of a living person in the place of and for the sake of one who has died unbaptized: now practiced chiefly by Mormons.
- be for the high jump — to be liable to receive a severe reprimand or punishment
- be getting somewhere — If you say that you are getting somewhere, you mean that you are making progress towards achieving something.
- be in the market for — to wish to buy or acquire
- be shot through with — If something is shot through with an element or feature, it contains a lot of that element or feature.
- beaverhead mountains — a mountain range on the border of E Idaho and SW Montana, in the Bitterroot Range. 10,961 feet (3343 meters).
- beggar-your-neighbor — a children's card game for two, played with 52 cards, that is won when a player captures all of the cards.
- belgian shepherd dog — a medium-sized well-proportioned dog of a breed that resembles an Alsatian in appearance and is often used as a sheepdog or a guard dog
- benzene hexachloride — a compound, C6H6Cl6, used as an insecticide
- benzyl isoamyl ether — a colorless liquid, C 12 H 18 O, used in soap perfumes.
- bismarck archipelago — a group of over 200 islands in the SW Pacific, northeast of New Guinea: part of Papua New Guinea. Main islands: New Britain, New Ireland, Lavongai, and the Admiralty Islands. Chief town: Rabaul, on New Britain. Pop: 566 610 (2000). Area: 49 658 sq km (19 173 sq miles)
- black-throated diver — a diving bird, Gavia arctica, found in Europe and Asia, and a rare summer visitor to the UK
- born-again christian — person: evangelical
- bowling on the green — lawn bowling.
- bowling-on-the-green — a game played with wooden balls on a level, closely mowed green having a slight bias, the object being to roll one's ball as near as possible to a smaller white ball at the other end of the green. Also called bowls, bowling on the green. Compare bowl2 (def 2), bowling green, jack1 (def 7), rink (def 5).
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