19-letter words containing a, p, r, o
- digital photography — the taking or manipulation of photographs that are stored as data files on a computer.
- directional coupler — (communications) (tap) A passive device used in cable systems to divide and combine radio frequency signals. A directional coupler has at least three ports: line in, line out, and the tap. The signal passes between line in and line out ports with loss referred to as the insertion loss. A small portion of the signal power applied to the line in port passes to the tap port. A signal applied to the tap port is passed to the line in port less the tap attenuation value. The tap signals are isolated from the line out port to prevent reflections. A signal applied to the line out port passes to the line in port and is isolated from the tap port. Some devices provide more than one tap output line (multi-taps).
- disciplinary action — punishment or caution
- dispersion relation — the relationship between the angular frequency (ω;) of a wave and the magnitude of its wave vector (k). Thus the wave's speed is ω/k
- displaced homemaker — a woman recently divorced, separated, or widowed after many years as a homemaker.
- diversional therapy — the structured use of leisure time in recreation and play as a form of or supplement to conventional therapy
- dry-bulk cargo ship — a ship that carries an unpackaged dry cargo such as coal or grain; bulk carrier
- early purple orchid — a Eurasian orchid, Orchis mascula, with purplish-crimson flowers and stems marked with blackish-purple spots
- ecatepec de morelos — a city in S central Mexico, a suburb of Mexico City: on a 12th-century Aztec site.
- echoencephalography — a device that employs reflected ultrasonic waves to examine the position of brain structures.
- 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.
- electrode potential — the potential difference developed when an electrode of an element is placed in a solution containing ions of that element
- electron micrograph — a photograph or image of a specimen taken using an electron microscope
- electronic graphics — (on television) the production of graphic designs and text by electronic means
- electropalatography — the study of the movements of the tongue during speech using touch-sensitive electrodes in the mouth linked to a computer
- electrophoretically — By means of electrophoresis.
- electrophotographic — Of or pertaining to electrophotography.
- electrotherapeutics — (medicine) the use of electricity in therapeutics.
- employment tribunal — (in England, Scotland, and Wales) a tribunal that rules on disputes between employers and employees regarding unfair dismissal, redundancy, etc
- entitlement program — a government program providing defined sectors of the population with social benefits
- equal opportunities — Equal opportunities refers to the policy of giving everyone the same opportunities for employment, pay and promotion, without discriminating against particular groups.
- european commission — the executive body of the European Union formed in 1967, which initiates action in the EU and mediates between member governments
- european parliament — law: assembly in Strasbourg
- 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
- expeditionary force — An expeditionary force is a group of soldiers who are sent to fight in a foreign country.
- expressionistically — In an expressionistic manner.
- extreme programming — a discipline of software engineering following a specific structure, designed to simplify and speed up the development process
- eye make-up remover — a product used to remove cosmetics such as mascara and eyeliner
- family practitioner — medical specialization in general practice, requiring training beyond that of general practice and leading to board certification.
- farmers cooperative — an organization of farmers for marketing their products or buying supplies.
- female impersonator — a male performer who dresses as and impersonates women.
- first person plural — a grammatical category of pronouns and verbs used by the speaker to refer to or talk about himself together with others
- first-past-the-post — A first-past-the-post system for choosing members of parliament or other representatives is one in which the candidate who gets most votes wins.
- flowering raspberry — a shrub, Rubus ordoratus, of eastern North America, having loose clusters of showy purplish or rose-purple flowers and inedible, dry, red fruit.
- fluophosphoric acid — fluorophosphoric acid.
- fluoride toothpaste — toothpaste containing a small amount of fluoride as protection against tooth decay
- focal plane shutter — an opaque shield in a camera, lying in the focal plane of the lens, that, when tripped, admits light to expose the film or plate for a predetermined period, usually a fraction of a second
- focal-plane shutter — a camera shutter situated directly in front of the film.
- forensic psychiatry — the use of psychiatric knowledge and techniques in questions of law, as in determining legal insanity.
- fractal compression — (algorithm) A technique for encoding images using fractals.
- franco-prussian war — the war between France and Prussia, 1870–71.
- free alongside ship — (of a shipment of goods) delivered to the dock without charge to the buyer, but excluding the cost of loading onto the vessel
- freezer compartment — in a refrigerator, an enclosed area kept at a temperature low enough to store frozen foods or freeze non-frozen foods
- from pillar to post — an upright shaft or structure, of stone, brick, or other material, relatively slender in proportion to its height, and of any shape in section, used as a building support, or standing alone, as for a monument: Gothic pillars; a pillar to commemorate Columbus.
- general post office — (in the U.S. postal system) the main post office of a city, county, etc., that also has branch post offices. Abbreviation: G.P.O., GPO.
- generic programming — (programming) A programming technique which aims to make programs more adaptable by making them more general. Generic programs often embody non-traditional kinds of polymorphism; ordinary programs are obtained from them by suitably instantiating their parameters. In contrast with normal programs, the parameters of a generic programs are often quite rich in structure. For example they may be other programs, types or type constructors or even programming paradigms.
- genetic programming — (programming) (GP) A programming technique which extends the genetic algorithm to the domain of whole computer programs. In GP, populations of programs are genetically bred to solve problems. Genetic programming can solve problems of system identification, classification, control, robotics, optimisation, game playing, and pattern recognition. Starting with a primordial ooze of hundreds or thousands of randomly created programs composed of functions and terminals appropriate to the problem, the population is progressively evolved over a series of generations by applying the operations of Darwinian fitness proportionate reproduction and crossover (sexual recombination).