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19-letter words containing a, c, t, o, r, e

  • cultivated mushroom — an edible mushroom (Agaricus bisporus) with a pale cap and stalk: the most common food mushroom
  • cultural revolution — (in China) a mass movement (1965–68), in which the youthful Red Guard played a prominent part. It was initiated by Mao Tse-tung to destroy the power of the bureaucrats and to revolutionize the attitudes and behaviour of the people
  • current transformer — A current transformer is a transformer that is designed to give an accurate current ratio for the purpose of measurement and control.
  • customs declaration — a form declaring the nature and value of goods, etc, for customs purposes
  • customs regulations — the regulations relating to customs in a particular country
  • data encryption key — (DEK) Used for the encryption of message text and for the computation of message integrity checks (signatures). See cryptography.
  • data protection act — (legal)   (DPA) A UK law guaranteeing rights to individuals in relation to personal data that others hold on them. For example, under the DPA, you have the right to see what data a company holds on you.
  • de-compartmentalize — to divide into categories or compartments.
  • declaration of love — a statement made by one person to another in which they say they are in love with the other person
  • deflate compression — deflate
  • dental receptionist — a receptionist working in a dental surgery
  • 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.
  • dictionary of names — a dictionary of given names that indicates whether a name is usually male, female, or unisex and often includes origins as well as meanings; for example, as by indicating that Evangeline, meaning “good news,” comes from Greek. Used primarily as an aid in selecting a name for a baby, dictionaries of names may also include lists of famous people who have shared a name and information about its current popularity ranking.
  • dielectric constant — Electricity. the ratio of the flux density produced by an electric field in a given dielectric to the flux density produced by that field in a vacuum.
  • difference equation — (mathematics)   A relation between consecutive elements of a sequence. The first difference is D u(n) = u(n+1) - u(n) where u(n) is the nth element of sequence u. The second difference is u(n+2) + a u(n+1) + b u(n) = 0 can be converted to a difference equation (in this case, a second order linear difference equation): D2 u(n) + p D u(n) + q u(n) = 0 and vice versa. a, b, p, q are constants.
  • diffraction pattern — the phenomenon exhibited by wave fronts that, passing the edge of an opaque body, are modulated, thereby causing a redistribution of energy within the front: it is detectable in light waves by the presence of a pattern of closely spaced dark and light bands (diffraction pattern) at the edge of a shadow.
  • 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.
  • 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
  • direction indicator — aerial used in wireless communication
  • 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).
  • discretionary trust — a trust in which the beneficiaries' shares are not fixed in the trust deed but are left to the discretion of other persons, often the trustees
  • discriminated union — (theory)   The discriminated union of two sets A and B is A + B = {(inA, a) | a in A} U {(inB, b)| b in B} where inA and inB are arbitrary tags which specify which summand an element originates from. A type (especially an algebraic data type) might be described as a discriminated union if it is a sum type whose objects consist of a tag to say which part of the union they belong to and a value of the corresponding type.
  • domain architecture — (systems analysis)   A generic, organisational structure or design for software systems in a domain. The domain architecture contains the designs that are intended to satisfy requirements specified in the domain model. A domain architecture can be adapted to create designs for software systems within a domain and also provides a framework for configuring assets within individual software systems.
  • draw the color line — to impose or accept the color line
  • draw the curtain on — to end
  • earthquake coverage — Earthquake coverage is insurance coverage for damage caused by earthquakes.
  • eastern coral snake — any of numerous venomous elapid snakes, found chiefly in the New World tropics, as Micrurus fulvius (eastern coral snake) of the southeastern U.S., often brilliantly marked with bands of red, yellow, and black.
  • ecatepec de morelos — a city in S central Mexico, a suburb of Mexico City: on a 12th-century Aztec site.
  • educational adviser — a person who provides advice and training to teachers about teaching methods and educational policies
  • elastic deformation — In elastic deformation a material changes shape when a stress is applied to it but goes back to its original state when the stress is removed.
  • elastomeric closure — An elastomeric closure is a component that closes a piece of packaging. An elastomeric closure is made from a material that is able to resume its original shape when it is removed from the packaging and may be in direct contact with the drug enclosed in the pack.
  • electro-shock baton — a baton used as a weapon to pass an electric current through part of the body
  • 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
  • electrodynamometers — Plural form of electrodynamometer.
  • electrohydrodynamic — (physics) Of or pertaining to electrohydrodynamics.
  • electromagnetically — By means of electromagnetism.
  • electromechanically — In an electromechanical way.
  • electron micrograph — a photograph or image of a specimen taken using an electron microscope
  • electronegativities — Plural form of electronegativity.
  • electronic graphics — (on television) the production of graphic designs and text by electronic means
  • electronic keyboard — a typewriter keyboard used to operate an electronic device such as a computer, word processor, etc
  • 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
  • electrophoretically — By means of electrophoresis.
  • electrophotographic — Of or pertaining to electrophotography.
  • electrostatic field — an electric field associated with static electric charges
  • electrostatic units — the system of CGS electric and magnetic units that assigns the value of one to the dielectric constant of a vacuum
  • electrotherapeutics — (medicine) the use of electricity in therapeutics.
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