19-letter words containing d, g, l
- dielectric strength — the maximum voltage that can be applied to a given material without causing it to break down, usually expressed in volts or kilovolts per unit of thickness.
- digital certificate — (communications, security) An attachment to an electronic mail message used for security purposes, e.g. to verify that a user sending a message is who he or she claims to be, and to provide the receiver with the means to encode a reply. An individual wishing to send an encrypted message applies for a digital certificate from a certificate authority (CA). The CA issues an encrypted digital certificate containing the applicant's public key and a variety of other identification information. The CA makes its own public key readily available on the Internet. The recipient of an encrypted message uses the CA's public key to decode the digital certificate attached to the message, verifies it as issued by the CA and then obtains the sender's public key and identification information held within the certificate.
- 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 linear tape — (storage) (DLT) A kind of magnetic tape drive originally developed by DEC and now marketed by Quantum. DLT drives implement the Digital Lempel Ziv 1 (DLZ1) compression algorithm in a combination of hardware and firmware. They use a popular chip by Stac (now hi/fn) to do the string searching. Counting, sorting and Huffman coding are done in firmware (with hardware support for the Huffman algorithm?). In April 1997 DLT drives can transfer 5 megabytes per second and can store 35 gigabytes on a single cartridge. Compression might roughly double these figures.
- 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
- displacement engine — any engine employing the rectilinear motion of one or more pistons in cylinders.
- display advertising — display ads taken collectively.
- distinguishableness — The state or quality of being distinguishable.
- dominant wavelength — the wavelength of monochromatic light that would give the same visual sensation if combined in a suitable proportion with an achromatic light
- don't make me laugh — Some people reply to other people's comments or opinions by saying 'Don't make me laugh' when they disagree with them and think they are foolish or inaccurate.
- double-helical gear — herringbone gear.
- dry-bulk cargo ship — a ship that carries an unpackaged dry cargo such as coal or grain; bulk carrier
- duplicating machine — a duplicator, especially one for making identical copies of documents, letters, etc.
- 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.
- euclidean algorithm — Euclid's Algorithm
- fault-based testing — (testing) Software testing using test data designed to demonstrate the absence of a set of pre-specified faults; typically, frequently occurring faults. For example, to demonstrate that the software handles or avoids divide by zero correctly, the test data would include zero.
- feather-tail glider — pygmy glider.
- floating foundation — a foundation used in yielding soil, having for its footing a raft tending to displace a weight greater than that of the building.
- for crying out loud — exasperation
- free alongside quay — (of a shipment of goods) delivered to the quay without charge to the buyer
- 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
- galactic coordinate — Usually, galactic coordinates. a member of a system of coordinates that define the position of a celestial body with reference to the Milky Way.
- gentile da fabriano — 1370?–1427, Italian painter.
- geothermal gradient — the increase in temperature with increasing depth within the earth.
- geraldton waxflower — an evergreen shrub, Chamelaucium uncinatum, native to W Australia, cultivated for its pale pink flowers
- germander speedwell — a speedwell, Veronica chamaedrys, having blue flowers.
- giovanni da bologna — Giovanni da [jee-uh-vah-nee duh;; Italian jaw-vahn-nee dah] /ˌdʒi əˈvɑ ni də;; Italian dʒɔˈvɑn ni dɑ/ (Show IPA), (Jean de Boulogne; Giambologna) c1525–1608, Italian sculptor, born in France.
- giovanni da fiesole — Giovanni da [Italian jaw-vahn-nee dah] /Italian dʒɔˈvɑn ni dɑ/ (Show IPA), Angelico, Fra.
- giraldus cambrensis — literary name of Gerald de Barri. ?1146–?1223, Welsh chronicler and churchman, noted for his accounts of his travels in Ireland and Wales
- glacial acetic acid — acetic acid of at least 99.5 percent concentration, solidifying at 16.7°C.
- gloucester old spot — a hardy rare breed of pig, white with a few black markings, that originally lived off windfalls in orchards in the Severn valley
- go into liquidation — to close one's business by collecting assets and settling all debts
- go round in circles — to engage in energetic but fruitless activity
- godfrey of bouillon — (Duke of Lower Lorraine) 1060?–1100, French leader of the First Crusade 1096–99.
- gold-rimmed glasses — spectacles with gold-coloured frames
- goldbach conjecture — an unproved theorem that every even integer greater than 2 can be written as the sum of two prime numbers.
- golden lion tamarin — a monkey, Leontopithecus rosalia rosalia, of tropical rain forests of southeastern Brazil, having a silky golden coat and a long golden mane: threatened with extinction.
- goodwill ambassador — an ambassador who shows goodwill to another country, organization, etc, on behalf of his or her own country, organization, etc
- grand duke nicholas — of Cusa [kyoo-zuh] /ˈkyu zə/ (Show IPA), 1401–1464, German cardinal, mathematician, and philosopher. German Nikolaus von Cusa.
- grandfather's clock — a pendulum floor clock having a case as tall as or taller than a person; tall-case clock; long-case clock.
- grandmother's clock — a pendulum clock similar to a grandfather's clock but shorter.
- gravitational field — the attractive effect, considered as extending throughout space, of matter on other matter.
- great-grandchildren — a grandchild of one's son or daughter.
- ground-plane aerial — a quarter-wave vertical dipole aerial in which the electrical image forming the other quarter-wave section is formed by reflection in a system of radially disposed metal rods or in a conductive sheet
- guillaume de lorris — 13th-century French poet who wrote the first 4058 lines of the allegorical romance, the Roman de la rose, continued by Jean de Meung
- head-and-tail light — a small South American characin fish, Hemmigrammus ocellifer, having shiny red eyes and tail spots, often kept in aquariums.
- heavy goods vehicle — a large road vehicle for carrying goods
- heel-and-toe racing — race walking.