20-letter words containing g, r, a

great dividing range — a mountain range extending along the E coast of Australia: vast watershed region. 100 to 200 miles (160–320 km) wide.
great northern diver — a large northern bird, Gavia immer, with a black-and-white chequered back and a black head and neck in summer: family Gaviidae (divers)
great-circle sailing — sailing between two points more or less according to an arc of a great circle, in practice almost always using a series of rhumb lines of different bearings to approximate the arc, whose own bearing changes constantly unless it coincides with a meridian or the equator.
great-great-grandson — the grandson of a grandchild
greatest lower bound — a lower bound that is greater than or equal to all the lower bounds of a given set: 1 is the greatest lower bound of the set consisting of 1, 2, 3. Abbreviation: glb.
green monkey disease — Marburg disease.
green mountain state — Vermont (used as a nickname).
greenwich hour angle — hour angle measured from the meridian of Greenwich, England.
gregory of nazianzus — Saint. ?329–89 ad, Cappadocian theologian: bishop of Caesarea (370–79). Feast days: Jan 2, 25, and 30
grey-crowned babbler — an insect-eating Australian bird, Pomatostomus temporalis of the family Timaliidae
grievous bodily harm — law: serious injury
group life insurance — a form of life insurance available to members of a group, typically employees of a company, under a master policy.
group representation — representation in a governing body on the basis of interests rather than by geographical location.
guarded horn clauses — (language) (GHC) A parallel dialect of Prolog by K. Ueda in which each clause has a guard. GHC is similar to Parlog. When several clauses match a goal, their guards are evaluated in parallel and the first clause whose guard is found to be true is used and others are rejected. It uses committed-choice nondeterminism. See also FGHC, KL1.
happy hunting ground — the North American Indian heaven, conceived of as a paradise of hunting and feasting for warriors and hunters.
hard gelatin capsule — A hard gelatin capsule is a type of capsule that is usually used to contain medicine in the form of dry powder or very small pellets.
hardware handshaking — (communications) A technique for regulating the flow of data across an interface by means of signals carried on separate wires. A common example is the RTS (Request to Send) and CTS (Clear to Send) signals on an EIA-232 serial line. The alternative, software handshaking, uses two special characters inserted into the data stream to carry the same information.
harmonic progression — a series of numbers the reciprocals of which are in arithmetic progression.
hate a person's guts — to dislike a person very strongly
hazard warning lamps — Hazard warning lamps are flashing lamps on each corner of a vehicle that are used to show the position of the vehicle if there has been a breakdown or an accident.
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.
hierarchical routing — The complex problem of routing on large networks can be simplified by breaking a network into a hierarchy of smaller networks, where each level is responsible for its own routing. The Internet has, basically, three levels: the backbones, the mid-levels, and the stub networks. The backbones know how to route between the mid-levels, the mid-levels know how to route between the sites, and each site (being an autonomous system) knows how to route internally. See also Exterior Gateway Protocol, Interior Gateway Protocol, transit network.
high-energy particle — Physics
hildegard von bingen — Hildegard von (Hildegard of Bingen"Sibyl of the Rhine") 1098–1178, German nun, healer, writer, and composer.
historical sociology — the sociological study of the origins and development of societies and of other social phenomena that seeks underlying laws and principles.
how are you keeping? — how are you?
human genome project — a federally funded U.S. scientific project to identify both the genes and the entire sequence of DNA base pairs that make up the human genome.
human growth hormone — somatotropin. Abbreviation: hGH.
hungarian bromegrass — a pasture grass, Bromus inermis, native to Europe, having smooth blades.
hydraulic fracturing — a process in which fractures in rocks below the earth's surface are opened and widened by injecting chemicals and liquids at high pressure: used especially to extract natural gas or oil.
hyperbolic cotangent — a hyperbolic function that is the ratio of cosh to sinh, being the reciprocal of tanh; coth
in (or out of) gear — (not) connected to the motor
in flagrante delicto — Law. in the very act of committing the offense.
industrial espionage — the stealing of technological or commercial research data, blueprints, plans, etc., as by a person in the hire of a competing company.
industrial sociology — the sociological study of social relationships and social structures in business settings.
inelastic scattering — a scattering of particles due to an inelastic collision that also changes their wavelengths and phases.
inertial upper stage — a U.S. two-stage, solid-propellant rocket used to boost a relatively heavy spacecraft from a low earth orbit into a planetary trajectory or an elliptical transfer orbit. Abbreviation: IUS.
infiltration gallery — a conduit, built in permeable earth, for collecting ground water.
information exchange — discussion that involves exchanging ideas and knowledge
infrared photography — photography using film with an emulsion that is sensitive to infrared light, enabling it to be used in misty weather, in darkened interiors, or at night. It has applications in aerial surveys, the detection of forgeries, etc
initial program load — (operating system) (IPL) The procedure used to (re-)start a computer system by copying the operating system kernel into main memory and running it. Part of the boot sequence.
innerspring mattress — a mattress with built-in coil springs
integration by parts — Mathematics. a method of evaluating an integral by use of the formula, ∫udv = uv − ∫vdu.
integrity constraint — (database) A constraint (rule) that must remain true for a database to preserve data integrity. Integrity constraints are specified at database creation time and enforced by the database management system. Examples from a genealogical database would be that every individual must be their parent's child or that they can have no more than two natural parents.
intelligent terminal — (hardware) (or "smart terminal", "programmable terminal") A terminal that often contains not only a keyboard and screen, but also comes with a disk drive and printer, so it can perform limited processing tasks when not communicating directly with the central computer. Some can be programmed by the user to perform many basic tasks, including both arithmetic and logic operations. In some cases, when the user enters data, the data will be checked for errors and some type of report will be produced. In addition, the valid data that is entered may be stored on the disk, it will be transmitted over communication lines to the central computer. An intelligent terminal may have enough computing capability to draw graphics or to offload some kind of front-end processing from the computer it talks to. The development of workstations and personal computers has made this term and the product it describes semi-obsolescent, but one may still hear variants of the phrase "act like a smart terminal" used to describe the behaviour of workstations or PCs with respect to programs that execute almost entirely out of a remote server's storage, using said devices as displays. The term once meant any terminal with an addressable cursor; the opposite of a glass tty. Today, a terminal with merely an addressable cursor, but with none of the more-powerful features mentioned above, is called a dumb terminal. There is a classic quote from Rob Pike (inventor of the blit terminal): "A smart terminal is not a smart*ass* terminal, but rather a terminal you can educate". This illustrates a common design problem: The attempt to make peripherals (or anything else) intelligent sometimes results in finicky, rigid "special features" that become just so much dead weight if you try to use the device in any way the designer didn't anticipate. Flexibility and programmability, on the other hand, are *really* smart. Compare hook.
international gothic — a style of Gothic art, especially painting, developed in Europe in the late 14th and early 15th centuries, chiefly characterized by details carefully delineated in a naturalistic manner, elongated and delicately modeled forms, the use of complex perspective, and an emphasis on the decorative or ornamental aspect of drapery, foliage, or setting.
international orange — a shade of bright orange, highly visible at a great distance and in murky weather, used to color aircraft, airport towers and hangars, boats, etc., for safety or rescue purposes.
intervening variable — a hypothetical variable postulated to account for the way in which a set of independent variables control a set of dependent variables
into/in cold storage — If you put an idea or plan into cold storage or in cold storage, you delay it for a while rather than acting on it as you originally intended.
intravenous drug use — the injection of drugs intravenously

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