19-letter words containing p, e, n, t
- dimetric projection — a type of axonometric projection in which the object is shown with two of its three principal axes tilted equally from the plane of viewing
- direct-vision prism — Amici prism.
- 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).
- diriment impediment — a fact or circumstance that renders a marriage void from the beginning.
- disambiguation page — a page on a website that lists various websites or web pages that have or could have the same title. The user is able to select from the list that page, site etc that he or she actually wants
- disjunctive pronoun — an inflection of pronouns in some languages that is used alone or after a preposition, such as moi in French
- dispatch department — the department of an organization responsible for the dispatch of orders
- 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
- displacement engine — any engine employing the rectilinear motion of one or more pistons in cylinders.
- display advertising — display ads taken collectively.
- diversional therapy — the structured use of leisure time in recreation and play as a form of or supplement to conventional therapy
- dobsonian telescope — a relatively inexpensive Newtonian telescope, suitable for visual but not photographic use, in which the tube assembly slips freely in the lower base.
- double counterpoint — invertible counterpoint using two transposable voices.
- duplicating machine — a duplicator, especially one for making identical copies of documents, letters, etc.
- eight queens puzzle — (algorithm) A puzzle in which one has to place eight queens on a chessboard such that no queen is attacking any other, i.e. no two queens occupy the same row, column or diagonal. One may have to produce all possible such configurations or just one. It is a common students assignment to devise a program to solve the eight queens puzzle. The brute force algorithm tries all 64*63*62*61*60*59*58*57 = 178,462,987,637,760 possible layouts of eight pieces on a chessboard to see which ones meet the criterion. More intelligent algorithms use the fact that there are only ten positions for the first queen that are not reflections of each other, and that the first queen leaves at most 42 safe squares, giving only 10*42*41*40*39*38*37*36 = 1,359,707,731,200 layouts to try, and so on. The puzzle may be varied with different number of pieces and different size boards.
- 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
- electron microscope — An electron microscope is a type of very powerful microscope that uses electrons instead of light to produce a magnified image of something.
- electron multiplier — a device for amplifying and measuring a flux of electrons. Each electron hits an anode surface and releases secondary electrons that are accelerated to a second surface; after several such stages a measurable pulse of current is obtained
- electronic graphics — (on television) the production of graphic designs and text by electronic means
- elementary particle — any of several entities, such as electrons, neutrons, or protons, that are less complex than atoms and are regarded as the constituents of all matter
- emergency telephone — a public telephone intended for use in emergencies: for example, at the side of a motorway
- employment tribunal — (in England, Scotland, and Wales) a tribunal that rules on disputes between employers and employees regarding unfair dismissal, redundancy, etc
- empty-nest syndrome — a condition, often involving depression, loneliness, etc, experienced by parents living in a home from which the children have grown up and left
- english toy spaniel — breed of dog
- 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 parliament — law: assembly in Strasbourg
- evaporative cooling — a method of reducing temperature that uses evaporation
- executive president — a president in certain systems of government who possesses wide powers
- expeditionary force — An expeditionary force is a group of soldiers who are sent to fight in a foreign country.
- experimenter effect — the influence of an experimenter's expectations on his results
- expressionistically — In an expressionistic manner.
- extendible compiler — (language) (ETC) A Fortran-like compiler that can be extended with macros.
- extreme programming — a discipline of software engineering following a specific structure, designed to simplify and speed up the development process
- family practitioner — medical specialization in general practice, requiring training beyond that of general practice and leading to board certification.
- female impersonator — a male performer who dresses as and impersonates women.
- 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.
- first person plural — a grammatical category of pronouns and verbs used by the speaker to refer to or talk about himself together with others
- 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.
- follow-up interview — a second interview following an initial interview
- 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.
- freezer compartment — in a refrigerator, an enclosed area kept at a temperature low enough to store frozen foods or freeze non-frozen foods
- front-end processor — a small computer or other dedicated device that performs preliminary processing of data for a host computer.
- gedanken experiment — thought experiment.
- general partnership — a partnership in which each of the partners is fully liable for the firm's debts.
- 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.