19-letter words containing h, e, n, l

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
emergency telephone — a public telephone intended for use in emergencies: for example, at the side of a motorway
enabling technology — technology that enables the user to perform a task or to improve his or her overall performance: e.g. the internet
english toy spaniel — breed of dog
equatorial zenithal — a type of map projection in which part of the earth's surface is projected onto a plane tangential to it at the equator
euclidean algorithm — Euclid's Algorithm
exhibitionistically — In an exhibitionistic manner.
fall in love (with) — to begin to feel love (for)
finger on the pulse — If you have your finger on the pulse of something, you know all the latest opinions or developments concerning it.
flannelmouth sucker — a sucker, Catostomus latipinnis, of the Colorado River and its tributaries.
flavor of the month — Informal. the subject of intense, usually temporary interest; the current fashion.
fly in the ointment — Also called true fly. any of numerous two-winged insects of the order Diptera, especially of the family Muscidae, as the common housefly.
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.
for the life of one — the condition that distinguishes organisms from inorganic objects and dead organisms, being manifested by growth through metabolism, reproduction, and the power of adaptation to environment through changes originating internally.
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
frontier technology — innovative or new technology
gas central heating — a system of central heating fuelled by combustible gas
general anaesthesia — the use of a general anaesthetic
general anaesthetic — sth administered to induce unconsciousness
general of the army — the highest ranking military officer; the next rank above general.
general partnership — a partnership in which each of the partners is fully liable for the firm's debts.
geothermal gradient — the increase in temperature with increasing depth within the earth.
go jump in the lake — a body of fresh or salt water of considerable size, surrounded by land.
go to great lengths — If you say that someone goes to great lengths to achieve something, you mean that they try very hard and perhaps do extreme things in order to achieve it.
goldbach conjecture — an unproved theorem that every even integer greater than 2 can be written as the sum of two prime numbers.
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.
great wall of china — a system of fortified walls with a roadway along the top, constructed as a defense for China against the nomads of the regions that are now Mongolia and Manchuria: completed in the 3rd century b.c., but later repeatedly modified and rebuilt. 2000 miles (3220 km) long.
great-grandchildren — a grandchild of one's son or daughter.
greenhouse whitefly — See under whitefly.
gulf of tehuantepec — an inlet of the Pacific on the south coast of the Isthmus of Tehuantepec in S Mexico
halt and catch fire — (humour, processor) (HCF) Any of several undocumented and semi-mythical machine instructions with destructive side-effects, supposedly included for test purposes on several well-known architectures going as far back as the IBM 360. The Motorola 6800 microprocessor was the first for which an HCF opcode became widely known. This instruction caused the processor to read every memory location sequentially until reset.
hamiltonian problem — (computability) (Or "Hamilton's problem") A problem in graph theory posed by William Hamilton: given a graph, is there a path through the graph which visits each vertex precisely once (a "Hamiltonian path")? Is there a Hamiltonian path which ends up where it started (a "Hamiltonian cycle" or "Hamiltonian tour")? Hamilton's problem is NP-complete. It has numerous applications, sometimes completely unexpected, in computing.
handlebar moustache — a man's moustache having long, curved ends that resemble the handlebars of a bicycle.
hang in the balance — to fasten or attach (a thing) so that it is supported only from above or at a point near its own top; suspend.
hang on the lips of — to listen to with close attention
haute vulgarisation — vulgarization, or popularization, on a higher level, esp. as done by academics, scholars, etc.
have half a mind to — to have the intention of
have one's blood up — to be or cause to be angry or inflamed
head-and-tail light — a small South American characin fish, Hemmigrammus ocellifer, having shiny red eyes and tail spots, often kept in aquariums.
health professional — a person trained to work in any field of physical or mental health.
heat of sublimation — the heat absorbed by one gram or unit mass of a substance in the process of changing, at a constant temperature and pressure, from a solid to a gaseous state. Compare sublime (def 10).
heel-and-toe racing — race walking.
heine-borel theorem — the theorem that in a metric space every covering consisting of open sets that covers a closed and compact set has a finite collection of subsets that covers the given set.
heinrich schliemann — Heinrich [hahyn-rikh] /ˈhaɪn rɪx/ (Show IPA), 1822–90, German archaeologist: excavated ancient cities of Troy and Mycenae.
helsinki conference — Conference on Security and Cooperation in Europe.
hepatic portal vein — a vein connecting two capillary networks in the liver

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