18-letter words containing p, e, r, o, t

temporary hardness — hardness of water due to the presence of magnesium and calcium hydrogencarbonates, which can be precipitated as carbonates by boiling
territory of papua — a former territory of Australia, consisting of SE New Guinea and adjacent islands: now part of Papua New Guinea
the better part of — a large part of
the lords temporal — (in Britain) peers other than bishops in their capacity as members of the House of Lords
the operative word — If you describe a word as the operative word, you want to draw attention to it because you think it is important or exactly true in a particular situation.
the powers that be — You can refer to people in authority as the powers that be, especially when you want to say that you disagree with them or do not understand what they say or do.
the-cocktail-party — a play in verse (1950) by T. S. Eliot.
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-body problem — the problem of calculating the motions of three bodies in space moving under the influence of only their mutual gravitational attraction.
tip of the iceberg — a large floating mass of ice, detached from a glacier and carried out to sea.
to all appearances — apparently
to cast aspersions — If you cast aspersions on someone or something, you suggest that they are not very good in some way.
to get a bad press — If someone or something gets a bad press, they are criticized, especially in the newspapers, on television, or on radio. If they get a good press, they are praised.
to hold your peace — If you hold or keep your peace, you do not speak, even though there is something you want or ought to say.
to learn the ropes — If you are learning the ropes, you are learning how a particular task or job is done.
to open your heart — If you open your heart or pour out your heart to someone, you tell them your most private thoughts and feelings.
to play favourites — to display favouritism
to put years on sb — if you say that something such as an experience or a way of dressing has put years on someone, you mean that it has made them look or feel much older
to scrape a living — If you say that someone scrapes a living or scratches a living, you mean that they manage to earn enough to live on, but it is very difficult. In American English, you say they scrape out a living or scratch out a living.
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 sweep the board — If someone sweeps the board in a competition or election, they win nearly everything that it is possible to win.
to watch your step — If someone tells you to watch your step, they are warning you to be careful about how you behave or what you say so that you do not get into trouble.
torsion-free group — a group in which every element other than the identity has infinite order.
traditional weapon — a weapon having ceremonial tribal significance, such as an assegai or knobkerrie
transient response — A transient response of a circuit is a temporary change in the way that it behaves due to an external excitation, that will disappear with time.
transporter bridge — a bridge for carrying passengers and vehicles by means of a platform suspended from a trolley.
transverse process — a process that projects from the sides of a vertebra.
turn up one's nose — to behave disdainfully towards (something)
turn up one's toes — to die
two-colour process — (in early colour photography) a method of printing which uses superimposed red and green images
under-compensation — to compensate or pay less than is fair, customary, or expected.
under-depreciation — decrease in value due to wear and tear, decay, decline in price, etc.
unfair competition — acts done by a seller to confuse or deceive the public with intent to acquire a larger portion of the market, as by cutting prices below cost, misleading advertising, selling a spurious product under a false identity, etc.
up to one's tricks — If you say that someone is up to their tricks or up to their old tricks, you disapprove of them because they are behaving in the dishonest or deceitful way in which they typically behave.
upper palaeolithic — the latest of the three periods of the Palaeolithic, beginning about 40 000 bc and ending, in Europe, about 12 000 bc: characterized by the emergence of modern man, Homo sapiens
upper partial tone — overtone (def 1).
urban contemporary — popular dance music incorporating elements of rap, rhythm-and-blues, funk, and soul.
vectorcardiography — a method of determining the direction and magnitude of the electrical forces of the heart.
videotape recorder — a device for recording television programs on magnetic tape for delayed transmission or for storage.
vigoureux printing — a printing method in which worsted fibers are printed with the desired color while in sliver form and then processed into yarn, producing a mixed color in the spun yarn and woven fabric.
visiting professor — a professor from another institution invited to teach at a university or college for a limited period, usually for a semester or one academic year.
warehouse capacity — the amount of storage space in a warehouse
western isles pony — a breed of large pony, typically grey, with a dense waterproof coat. The only surviving variety is the Eriskay pony
white iron pyrites — marcasite
wireless telephone — Now Rare. radiotelephony.
wireless telephony — Now Rare. radiotelephony.
women at point sur — a narrative poem (1927) by Robinson Jeffers.
working hypothesis — See under hypothesis (def 1).
x-ray spectrometer — a spectrometer using x-rays to activate the inner electrons of an atom in order to separate and identify the chemical constituents of a substance and their concentrations.
x-ray spectrometry — the use of an x-ray spectrometer.

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