19-letter words containing t, g, r, o
- customs regulations — the regulations relating to customs in a particular country
- de broglie equation — the postulate of wave mechanics that a particle of mass m moving at a velocity v will have the properties of a wave of wavelength h / mv (de Broglie wavelength) where h is Planck's constant.
- desargues's theorem — the theorem that if two triangles are so related that the lines joining corresponding vertices meet in a point, then the extended corresponding lines of the two triangles meet in three points, all on the same line.
- diamond ring effect — a phenomenon, sometimes observed immediately before and after a total eclipse of the sun, in which one of Baily's beads is much brighter than the others, resembling a diamond ring around the moon.
- diffraction grating — a band of equidistant, parallel lines, usually more than 5000 per inch (2000 per centimeter), ruled on a glass or polished metal surface for diffracting light to produce optical spectra.
- digital electronics — (electronics) The implementation of two-valued logic using electronic logic gates such as and gates, or gates and flip-flops. In such circuits the logical values true and false are represented by two different voltages, e.g. 0V for false and +5V for true. Similarly, numbers are normally represented in binary using two different voltages to represented zero and one. Digital electronics contrasts with analogue electronics which represents continuously varying quantities like sound pressure using continuously varying voltages. Digital electronics is the foundation of modern computers and digital communications. Massively complex digital logic circuits with millions of gates can now be built onto a single integrated circuit such as a microprocessor and these circuits can perform millions of operations per second.
- digital photography — the taking or manipulation of photographs that are stored as data files on a computer.
- direct grant school — (in Britain, formerly) a school financed by endowment, fees, and a state grant conditional upon admittance of a percentage of nonpaying pupils nominated by the local education authority
- ditty bag (or box) — a small bag (or box) used as by sailors for holding sewing equipment, toilet articles, etc.
- do not disturb sign — A do not disturb sign is a sign that a guest in a hotel hangs outside their room to tell other people not to knock the door or enter.
- don the baggy green — to represent Australia at Test cricket
- dwight d eisenhower — Dwight David ("Ike") 1890–1969, U.S. general and statesman: Chief of Staff 1945–48; 34th president of the U.S. 1953–61.
- earthquake coverage — Earthquake coverage is insurance coverage for damage caused by earthquakes.
- electrocardiographs — Plural form of electrocardiograph.
- electrocardiography — The measurement of electrical activity in the heart and the recording of such activity as a visual trace (on paper or on an oscilloscope screen), using electrodes placed on the skin of the limbs and chest.
- electromagnetically — By means of electromagnetism.
- electron micrograph — a photograph or image of a specimen taken using an electron microscope
- electronegativities — Plural form of electronegativity.
- electronic engineer — a person who is qualified or expert in electronic engineering
- electronic graphics — (on television) the production of graphic designs and text by electronic means
- electronic ignition — any system that uses an electronic circuit to supply the voltage to the sparking plugs of an internal-combustion engine
- electronic magazine — (messaging, publication, web) (e-zine) A regular publication on some particular topic distributed in digital form, chiefly now via the web but also by electronic mail or floppy disk. E-zines are often distributed for free by enthusiasts.
- electropalatography — the study of the movements of the tongue during speech using touch-sensitive electrodes in the mouth linked to a computer
- electrophotographic — Of or pertaining to electrophotography.
- electrophysiologist — A physiologist whose speciality is electrophysiology.
- emergency telephone — a public telephone intended for use in emergencies: for example, at the side of a motorway
- energy conservation — concerted formal or government action or policy to make sure that energy is not wasted
- engineering factory — a factory where engineering products are made
- entitlement program — a government program providing defined sectors of the population with social benefits
- equatorial mounting — an astronomical telescope mounting that allows motion of the telescope about two mutually perpendicular axes, one of which is parallel to the earth's axis
- error-based testing — (programming) Testing where information about programming style, error-prone language constructs, and other programming knowledge is applied to select test data capable of detecting faults, either a specified class of faults or all possible faults.
- essence of bergamot — a fragrant essential oil from the fruit rind of this plant, used in perfumery and some teas (including Earl Grey)
- euclidean algorithm — Euclid's Algorithm
- evaluation strategy — reduction strategy
- evaporative cooling — a method of reducing temperature that uses evaporation
- exophthalmic goiter — a disease of unknown cause characterized by enlargement of the thyroid gland, overproduction of the thyroid hormone, and abnormal protrusion of the eyeballs
- exophthalmic goitre — a form of hyperthyroidism characterized by enlargement of the thyroid gland, protrusion of the eyeballs, increased basal metabolic rate, and weight loss
- extreme programming — a discipline of software engineering following a specific structure, designed to simplify and speed up the development process
- feel strongly about — to have decided opinions concerning
- fighter-interceptor — a fighter plane used for the defense of a region against air attack, especially by attacking bombers.
- finger on the pulse — If you have your finger on the pulse of something, you know all the latest opinions or developments concerning it.
- fixed-rate mortgage — a home mortgage for which equal monthly payments of interest and principal are paid over the life of the loan, usually for a term of 30 years.
- floating restaurant — a boat or ship that has been converted for use as a restaurant
- for crying out loud — exasperation
- fortification agate — an agate, used as a gem, having polygonal banding such that it suggests the plan of a bastion.
- forward integration — the acquisition of all or part of a distribution chain by a firm that sells the goods distributed, so that the firm becomes or become closer to the direct seller of the goods
- framework agreement — an agreement that sets the limits and scope for further negotiation, discussion, etc
- freezing injunction — an order enabling the court to freeze the assets of a defendant, esp to prevent him or her taking them abroad
- from rags to riches — a worthless piece of cloth, especially one that is torn or worn.
- front-end financing — money or costs required or incurred in advance of a project in order to get it under way