21-letter words containing o, r, a, i
- glacier national park — a national park in NW Montana: glaciers; lakes; forest reserve. 1534 sq. mi. (3970 sq. km).
- glen of imaal terrier — a strongly-built medium-sized variety of terrier with a medium-length coat and short forelegs
- go (in) to bat for sb — If you go to bat for someone or go in to bat for them, you give them your support.
- gold bullion standard — a gold standard in which gold is not coined but may be purchased at a fixed price for foreign exchange.
- government in waiting — a political group which is hoping to be elected to govern in the near future
- gram-molecular weight — gram molecule. Abbreviation: GMW.
- great smoky mountains — the W part of the Appalachians, in W North Carolina and E Tennessee. Highest peak: Clingman's Dome, 2024 m (6642 ft)
- great victoria desert — a desert in SW central Australia. 125,000 sq. mi. (324,000 sq. km).
- green river ordinance — a local ordinance banning door-to-door selling.
- greenwich observatory — the national astronomical observatory of Great Britain, housed in a castle in E Sussex; formerly located at Greenwich.
- ground-effect machine — ACV (def 2).
- harriet beecher stowe — Harriet (Elizabeth) Beecher, 1811–96, U.S. abolitionist and novelist.
- hawaiian honeycreeper — any small to medium-sized finches of the subfamily Drepanidinae, native to the Hawaiian Islands and including many rare and extinct species.
- heliocentric parallax — the apparent displacement of an observed object due to a change in the position of the observer.
- help a person on with — to assist a person in the putting on of (clothes)
- highest common factor — greatest common divisor. Abbreviation: H.C.F.
- hildegard (of bingen) — Saint(1098-1179); Ger. nun, composer, & mystic: her day is Sept. 17
- historic places trust — (in New Zealand) the statutory body concerned with the conservation of historic buildings, esp with ancient Māori sites
- home improvement loan — a government loan for house improvements such as insulation, adding a bathroom, or urgent repairs
- horizontal stabilizer — the horizontal surface, usually fixed, of an aircraft empennage, to which the elevator is hinged.
- horizontal tabulation — (character) (tab, Control-I, HT, ASCII 9) A character which when displayed or printed causes the following character to be placed at the next "tabstop" - the column whose number is a multiple of the current tab width. Commonly (especially in Unix(?)) the tab width is eight, so, counting from the left margin (column zero), the tab stops are at columns 8, 16, 24, up to the width of the screen or page. A tab width of four or two is often preferred when indenting program source code to conserve indentation. Represented as "\t" in C, Unix, and derivatives.
- human papilloma virus — a species of virus that causes genital warts. Abbreviation: HPV.
- hydraulic accumulator — an apparatus in which gas, usually air, is used as a cushion or shock absorber in a hydraulic system.
- hyperbolic paraboloid — a paraboloid that can be put into a position such that its sections parallel to one coordinate plane are hyperbolas, with its sections parallel to the other two coordinate planes being parabolas.
- hypercholesterolaemia — the condition of having a high concentration of cholesterol in the blood
- hyperlipoproteinaemia — the condition of having an abnormally high level of lipoproteins in the blood
- hysterosalpingography — (medicine) X-ray examination of the uterus and oviducts following injection of a radiopaque substance.
- identical proposition — a proposition in which the subject and predicate have the same meaning, as, “That which is mortal is not immortal.”.
- identification papers — documents that serve to establish someone's identity
- identification parade — a group of persons including one suspected of having committed a crime assembled for the purpose of discovering whether a witness can identify the suspect
- imprecise probability — (probability) A probability that is represented as an interval (as opposed to a single number) included in [0,1].
- in (or out of) phase — in (or not in) a state of exactly parallel movements, oscillations, etc.; in (or not in) synchronization
- in (or out of) place — in (or out of) the customary, proper, or assigned place
- in a state of undress — If someone is in a state of undress, they do not have all their clothes on.
- in co-ordination with — If you do something in co-ordination with someone else, you both organize your activities so that you work together efficiently.
- in favor/out of favor — If someone or something is in favor, people like or support them. If they are out of favor, people no longer like or support them.
- in good circumstances — (of a person) in a good financial situation
- in more ways than one — You say in more ways than one to indicate that what you have said is intended to have more than one meaning.
- in no uncertain terms — If you say that someone tells a person something in no uncertain terms, you are emphasizing that they say it strongly and clearly so that there is no doubt about what they mean.
- in saecula saeculorum — for ever and ever.
- indicated horse-power — the horsepower of a reciprocating engine as shown by an indicator record. Abbreviation: ihp, IHP.
- indigenous australian — another name for Aboriginal and Torres Strait Islander
- indo-australian plate — a major tectonic division of the earth's crust, comprising India and the Australian continent and adjacent suboceanic basins (the Tasman, South Australian, Mid-Indian, Cocos, and Australian basins); separated from the Eurasian Plate by the Java Trench, from the Pacific Plate by the Tonga-Kermadec Trench, and from the African Plate by a series of mid-ocean ridges (the Carlsberg, Mid-Indian, and Southeast Indian ridges).
- induced radioactivity — artificial radioactivity.
- industrial misconduct — behaviour by an employee that is considered to be negligent or irregular to such an extent that disciplinary action may be taken, usually by agreement between management and the employee's representatives
- industrial psychology — the application of psychological principles and techniques to business and industrial problems, as in the selection of personnel or development of training programs.
- industrial revolution — (sometimes initial capital letters) the totality of the changes in economic and social organization that began about 1760 in England and later in other countries, characterized chiefly by the replacement of hand tools with power-driven machines, as the power loom and the steam engine, and by the concentration of industry in large establishments.
- infant mortality rate — number of babies dying
- infectious ectromelia — ectromelia (def 2).
- infiltration capacity — the maximum rate at which a soil in a given condition will absorb water.