19-letter words containing e, t, h, a, n, o

multinomial theorem — an expression of a power of a sum in terms of powers of the addends, a generalization of the binomial theorem.
multiplexor channel — (MPX) mainframe terminology for a slow peripheral device connection, e.g. for a printer, operator console, or card reader.
mushroom ventilator — a ventilator having at the top of a vertical shaft a broad rounded cap that can be screwed down to close it.
napierian logarithm — natural logarithm.
nathaniel hawthorne — Nathaniel, 1804–64, U.S. novelist and short-story writer.
national characters — (character) Characters with accents and other diacritical marks that are used in certain written languages (that are based on the Roman alphabet) but not in others, particularly not in English. A standard list is ISO Latin 1.
natural catastrophe — A natural catastrophe is an unexpected event, caused by nature, such as an earthquake or flood, in which there is a lot of suffering, damage, or death.
near to one's heart — cherished or important
neighbourhood watch — a scheme under which members of a community agree together to take responsibility for keeping an eye on each other's property, as a way of preventing crime
nernst heat theorem — the principle that reactions in crystalline solids involve changes in entropy that tend to zero as the temperature approaches absolute zero
nerve growth factor — a protein that promotes the growth, organization, and maintenance of sympathetic and some sensory nerve cells. Abbreviation: NGF.
neuropathologically — In a neuropathologic way.
newtonian mechanics — the branch of mechanics that is based on Newton's laws of motion and that is applicable to systems that are so large that Planck's constant can be regarded as negligibly small (distinguished from quantum mechanics).
niagara-on-the-lake — a town in SE Ontario, in S Canada, on Lake Ontario, at the mouth of the Niagara River, on the border between Canada and New York.
no strings attached — without conditions
non-distinguishable — to mark off as different (often followed by from or by): He was distinguished from the other boys by his height.
nonplayer character — a character in a tabletop role-playing game who is controlled by the Game Master.
nordrhein-westfalen — German name of North Rhine-Westphalia.
north new hyde park — a town on W Long Island, in SE New York.
north pacific ocean — the northern part of the Pacific Ocean, extending from the equator to the Arctic Ocean.
north valley stream — a town on W Long Island, in SE New York.
north-central state — a state of N Nigeria. Capital: Kaduna. Pop: 4 438 007 (1995 est). Area: 46 053 sq km (17 781 sq miles)
north-northeasterly — a wind or storm coming from the north-northeast
northwest ordinance — the act of Congress in 1787 providing for the government of the Northwest Territory and setting forth the steps by which its subdivisions might become states.
not worth a cracker — worthless; useless
not worth a crumpet — utterly worthless
noughts and crosses — tick-tack-toe (def 1).
noughts-and-crosses — tick-tack-toe (def 1).
occupational health — Occupational health is the branch of medicine that deals with the health of people in their workplace or in relation to their job.
old english pattern — a spoon pattern having a stem curving backward at the end.
old man and the sea — a novel (1952) by Ernest Hemingway.
on an empty stomach — If you do something on an empty stomach, you do it without having eaten.
on the baker's list — in good health
on the razor's edge — a sharp-edged instrument used especially for shaving the face or trimming the hair.
on-the-job training — apprenticeship, learning by doing
one after the other — one at a time
one way and another — on balance
open the floodgates — If events open the floodgates to something, they make it possible for that thing to happen much more often or much more seriously than before.
open-hearth furnace — a process of steelmaking in which the charge is laid in a furnace (open-hearth furnace) on a shallow hearth and heated directly by burning gas as well as radiatively by the furnace walls.
open-hearth process — a process of steelmaking in which the charge is laid in a furnace (open-hearth furnace) on a shallow hearth and heated directly by burning gas as well as radiatively by the furnace walls.
operations research — the analysis, usually involving mathematical treatment, of a process, problem, or operation to determine its purpose and effectiveness and to gain maximum efficiency.
oriental fruit moth — a moth, Grapholitha molesta, introduced into the U.S. from Asia, the larvae of which infest and feed on the twigs and fruits of peach, plum, and related trees.
orthopaedic surgeon — a surgeon specializing in the branch of surgery concerned with disorders of the spine and joints and the repair of deformities of these parts
out of the ordinary — of no special quality or interest; commonplace; unexceptional: One novel is brilliant, the other is decidedly ordinary; an ordinary person.
overhead projection — the projection (using an overhead projector) of an enlarged image of a transparency onto a surface above and behind the person using it
palaeoethnobotanist — someone who studies fossil seeds and grains to further archaeological knowledge, esp of the domestication of cereals
paleoanthropologist — the study of the origins and predecessors of the present human species, using fossils and other remains.
parathyroid hormone — a polypeptide hormone, produced in the parathyroid glands, that helps regulate the blood levels of calcium and phosphate. Abbreviation: PTH.
parthenogenetically — development of an egg without fertilization.
particle technology — Particle technology is knowledge and study which relates to particles, and is used in industry.

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