19-letter words containing s, r, t, a

nasty piece of work — malicious person
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.
national serviceman — a soldier undertaking compulsory military service
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
nearest and dearest — People sometimes refer to their close relatives and friends as their nearest and dearest.
neats vs. scruffies — (artificial intelligence, jargon) The label used to refer to one of the continuing holy wars in artificial intelligence research. This conflict tangles together two separate issues. One is the relationship between human reasoning and AI; "neats" tend to try to build systems that "reason" in some way identifiably similar to the way humans report themselves as doing, while "scruffies" profess not to care whether an algorithm resembles human reasoning in the least as long as it works. More importantly, neats tend to believe that logic is king, while scruffies favour looser, more ad-hoc methods driven by empirical knowledge. To a neat, scruffy methods appear promiscuous, successful only by accident and not productive of insights about how intelligence actually works; to a scruffy, neat methods appear to be hung up on formalism and irrelevant to the hard-to-capture "common sense" of living intelligences.
necessary condition — prerequisite
negative resistance — a characteristic of certain electronic components in which an increase in the applied voltage increases the resistance, producing a proportional decrease in current
nernst heat theorem — the principle that reactions in crystalline solids involve changes in entropy that tend to zero as the temperature approaches absolute zero
neurotransmissional — Relating to neurotransmission.
new year resolution — a promise to yourself or decision to do something, especially to improve one's behaviour or lifestyle in some way, during the year ahead
nine plus two array — the arrangement of microtubules in a flagellum or cilium, consisting of a ring of nine evenly spaced couplets surrounding two central singlets. Symbol: 9 + 2.
no strings attached — without conditions
non-contemporaneous — living or occurring during the same period of time; contemporary.
non-standardization — to bring to or make of an established standard size, weight, quality, strength, or the like: to standardize manufactured parts.
non-transferability — to convey or remove from one place, person, etc., to another: He transferred the package from one hand to the other.
nonrepresentational — not resembling or portraying any object in physical nature: a nonrepresentational painting.
nordrhein-westfalen — German name of North Rhine-Westphalia.
normal distribution — a theoretical frequency distribution represented by a normal curve.
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.
notre-dame-de-paris — Also called Notre Dame de Paris [French naw-truh dam duh pa-ree] /French nɔ trə dam də paˈri/ (Show IPA). a famous early gothic cathedral in Paris (started 1163).
noughts and crosses — tick-tack-toe (def 1).
noughts-and-crosses — tick-tack-toe (def 1).
nuclear disarmament — the gradual reduction and eventual elimination of all nuclear weapons in the world
nuits-saint-georges — a fine red wine produced near the town of Nuits-Saint-Georges in Burgundy
o tempora! o mores! — oh the times! oh the customs!: an exclamation at the evil of them
observation balloon — a balloon that is used for gathering information and reconnaissance purposes and spotting aircraft
oil-catalyst slurry — Oil-catalyst slurry is a heavy aromatic by-product of a refinery's fluid catalytic cracking unit, that forms a small part of global fuel oil supply.
old english pattern — a spoon pattern having a stem curving backward at the end.
olive-backed thrush — Swainson's thrush.
on first name terms — If two people are on first-name terms, they know each other well enough to call each other by their first names, rather than having to use a more formal title.
on no consideration — for no reason whatsoever; never
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.
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.
operational testing — (testing) A US DoD term for testing performed by the end-user on software in its normal operating environment.
operations director — a director or senior manager who oversees the efficiency of business operations
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.
optical double star — two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star) or those that are relatively close together and comprise a single physical system (physical double star)
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
orthopaedic surgery — surgery concerned with disorders of the spine and joints and the repair of deformities of these parts
oscillating circuit — a circuit producing electrical oscillations.
over-sentimentality — the quality or state of being sentimental or excessively sentimental.
paleoanthropologist — the study of the origins and predecessors of the present human species, using fossils and other remains.
palomar observatory — an astronomical observatory situated on Palomar Mountain in S California, having a 200-inch (508-cm) reflecting telescope and a 48-inch (122-cm) Schmidt telescope.
pancreatic fibrosis — cystic fibrosis.

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