19-letter words containing h, e, r, n, i
- 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
- 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
- fair-weather friend — a person who cannot be relied on in situations of hardship or difficulty
- feynman, richard p. — Richard P. Feynman
- fighter-interceptor — a fighter plane used for the defense of a region against air attack, especially by attacking bombers.
- finds its/their way — If something finds its way somewhere, it comes to that place, especially by chance.
- finger on the pulse — If you have your finger on the pulse of something, you know all the latest opinions or developments concerning it.
- fixed exchange rate — finance: set rate of exchange
- 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.
- forensic psychiatry — the use of psychiatric knowledge and techniques in questions of law, as in determining legal insanity.
- frameshift mutation — a mutation caused by frameshift.
- 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
- french north africa — the former French possessions of Algeria, French Morocco, and Tunisia
- friend of the court — amicus curiae.
- 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 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.
- grand duke nicholas — of Cusa [kyoo-zuh] /ˈkyu zə/ (Show IPA), 1401–1464, German cardinal, mathematician, and philosopher. German Nikolaus von Cusa.
- grandfather's chair — wing chair.
- great idaean mother — Cybele.
- 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.
- greenwich mean time — the time as measured on the prime meridian running through Greenwich, England: used in England and as a standard of calculation elsewhere.
- hairdryer treatment — (esp in sport) the practice of shouting at someone at close quarters in order to express one's displeasure at something he or she has done
- 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.
- hang five (or ten) — to ride a surfboard with the toes of one (or both) feet draped over the front edge of the board
- harbinger-of-spring — a North American umbelliferous herb, Erigenia bulbosa, having white flowers that bloom early in the spring.
- haute vulgarisation — vulgarization, or popularization, on a higher level, esp. as done by academics, scholars, etc.
- have an ax to grind — an instrument with a bladed head on a handle or helve, used for hewing, cleaving, chopping, etc.
- health professional — a person trained to work in any field of physical or mental health.
- heart in your mouth — If your heart is in your mouth, you feel very excited, worried, or frightened.
- 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.
- henry david thoreau — Henry David, 1817–62, U.S. naturalist and author.
- henry the navigator — Prince, 1394–1460, prince of Portugal.
- hepatic portal vein — a vein connecting two capillary networks in the liver
- heptachlorobiphenyl — (organic compound) Either of twenty-four isomers of the polychlorinated biphenyl containing seven chlorine atoms.
- hermitian conjugate — adjoint (def 2).
- hester lynch piozzi — Hester Lynch (Hester Lynch Piozzi) 1741–1821, Welsh writer and friend of Samuel Johnson.
- hexafluoroplatinate — (chemistry) The univalent anion PtF6- prepared by reacting platinum hexafluoride with certain metals or other elements.
- high-bush cranberry — cranberry bush