18-letter words containing u, r, i

sustaining program — a radio or television program without a commercial sponsor.
symmetric function — a polynomial in several indeterminates that stays the same under any permutation of the indeterminates.
take out insurance — take out insurance against something
teacher evaluation — the process of vetting teachers to maintain teaching standards
temporal summation — the act or process of summing.
territory of papua — a former territory of Australia, consisting of SE New Guinea and adjacent islands: now part of Papua New Guinea
tertiary education — education, following secondary education at a school, at a college or university
tertiary structure — the way in which the helixes or beta structures of a polypeptide are folded or arranged into a three-dimensional configuration.
the baptist church — any of various Protestant churches that believe in the baptism of believers
the general public — the people in a society; people in general
the hotel industry — the branch of the services industry which provides hotels
the masurian lakes — a group of lakes in Masuria in NE Poland: scene of Russian defeats by the Germans (1914, 1915) during World War I
the movie industry — the industry that makes entertainment films or movies
the sun also rises — a novel (1926) by Ernest Hemingway.
the uncircumcision — the gentiles
the-master-builder — a play (1892) by Ibsen.
theodore gericault — (Jean Louis André) Théodore [zhahn lwee ahn-drey tey-aw-dawr] /ʒɑ̃ lwi ɑ̃ˈdreɪ teɪ ɔˈdɔr/ (Show IPA), 1791–1824, French painter.
there you go again — Phrases such as there you go again are used to show annoyance at someone who is repeating something that has annoyed you in the past.
therese de lisieux — Saint (Marie Françoise Thérèse Martin"the Little Flower") 1873–97, French Carmelite nun.
thermionic current — an electric current produced by the flow of thermions.
thermoluminescence — phosphorescence produced by the heating of a substance.
thin on the ground — If people or things of a particular kind are thin on the ground, there are very few of them.
thioarsenious acid — any of a group of hypothetical acids, H3AsS3, HAsS2, and H4As2S5, known only in the forms of their salts
thiosulphuric acid — an unstable acid known only in solutions and in the form of its salts. Formula: H2S2O3
third man argument — (in the philosophy of Aristotle) the argument against the existence of Platonic Forms that since the Form of Man is itself a perfect man, a further form (the "third" man) would be required to explain this, and so ad infinitum
thiruvananthapuram — a state in SW India: formerly the regions of Travancore and Cochin. 15,005 sq. mi. (38,836 sq. km). Capital: Thiruvananthapuram.
thought experiment — Physics. a demonstration or calculation that is based on the postulates of a theory, as relativity, and that demonstrates or clarifies the consequences of the postulates.
three-quarter time — the meter of a musical composition having a time signature of 3/4 and three quarter notes or their equivalent in each measure.
thrift-institution — economical management; economy; frugality.
to close your mind — If you close your mind to something, you deliberately do not think about it or pay attention to it.
to cross your mind — If you say that an idea or possibility never crossed your mind, you mean that you did not think of it.
to gird your loins — If you gird your loins, you prepare to do something difficult or dangerous.
to grit your teeth — If you grit your teeth, you make up your mind to carry on even if the situation is very difficult.
to play favourites — to display favouritism
to speak your mind — If you speak your mind, you say firmly and honestly what you think about a situation, even if this may offend or upset people.
to spill your guts — if someone spills their guts, they tell you everything about something secret or private
torsion-free group — a group in which every element other than the identity has infinite order.
tranquillizer dart — a dart filled with a tranquillizer that is shot from a gun in order to temporarily sedate an animal so that it may be handled safely
transfinite number — an infinite cardinal or ordinal number.
transit instrument — Astronomy. meridian circle.
transubstantiation — the changing of one substance into another.
treasury of merits — the superabundant store of merits and satisfactions, comprising those of Christ, the Virgin Mary, and the saints.
tristan und isolde — a music drama (composed, 1857–59; première, 1865) by Richard Wagner.
tristimulus values — three values that together are used to describe a colour and are the amounts of three reference colours that can be mixed to give the same visual sensation as the colour considered
trustee investment — an investment in which trustees are authorized to invest money belonging to a trust fund
tufted loosestrife — a primulaceous plant Naumburgia thyrsiflora
tune someone grief — to annoy or harass someone
turbine ventilator — a ventilator, usually mounted on the roof of a building, deck of a ship, etc., having at its head a globular, vaned rotor that is rotated by the wind, conveying air through a duct to and from a chamber below.
turn in on oneself — to withdraw or cause to withdraw from contact with others and become preoccupied with one's own problems
two-minute warning — a time-out called by an official to notify both teams that two minutes remain in a half.

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