15-letter words containing t, u, m, o, r
- nyquist theorem — (communications) A theorem stating that when an analogue waveform is digitised, only the frequencies in the waveform below half the sampling frequency will be recorded. In order to reconstruct (interpolate) a signal from a sequence of samples, sufficient samples must be recorded to capture the peaks and troughs of the original waveform. If a waveform is sampled at less than twice its frequency the reconstructed waveform will effectively contribute only noise. This phenomenon is called "aliasing" (the high frequencies are "under an alias"). This is why the best digital audio is sampled at 44,000 Hz - twice the average upper limit of human hearing. The Nyquist Theorem is not specific to digitised signals (represented by discrete amplitude levels) but applies to any sampled signal (represented by discrete time values), not just sound.
- obituary column — the division of a publication reserved for obituaries
- odd permutation — a permutation of a set of n elements, x 1 , x 2 , …, xn, which permutes the product of all differences of the form (xi – xj), where i is less than j, into the negative of the product.
- omnium gatherum — a miscellaneous collection.
- omnium-gatherum — a miscellaneous collection.
- open your mouth — If you say that someone does not open their mouth, you are emphasizing that they never say anything at all.
- opposite number — counterpart; equivalent: New members with an interest in folk art will find their opposite numbers in the association's directory.
- outdoorsmanship — a person devoted to outdoor sports and recreational activities, as hiking, hunting, fishing, or camping.
- over-enthusiasm — absorbing or controlling possession of the mind by any interest or pursuit; lively interest: He shows marked enthusiasm for his studies.
- overcommunicate — to communicate excessively
- overconsumption — the act of consuming, as by use, decay, or destruction.
- overstimulation — to rouse to action or effort, as by encouragement or pressure; spur on; incite: to stimulate his interest in mathematics.
- oyster mushroom — oyster cap.
- ozark mountains — an eroded plateau in S Missouri, N Arkansas, and NE Oklahoma. Area: about 130 000 sq km (50 000 sq miles)
- pamprodactylous — having all four toes directed forward, as in swifts and colies.
- pandorae fretum — an area in the southern hemisphere of Mars.
- parent compound — a compound from which derivatives may be obtained.
- paurometabolous — designating or of a group of insect orders, as orthopterans or hemipterans, in which metamorphosis to the adult state from the juvenile state is gradual and without any sudden, radical change of body form
- pectoral muscle — muscle of the chest
- pergamentaceous — (esp of plants) resembling parchment, whether in texture or composition
- petroleum ether — a volatile mixture of the higher alkane hydrocarbons, obtained as a fraction of petroleum and used as a solvent
- petroleum jelly — sticky substance used as lubricant
- phantom circuit — a circuit derived from two suitably arranged pairs of wires, each pair being a circuit (side circuit) and also acting as one half of an additional derived circuit, the entire system providing the capabilities of three circuits while requiring wires for only two.
- photofluorogram — a recording on photographic film of images produced by a fluoroscopic examination.
- photojournalism — journalism in which photography dominates written copy, as in certain magazines.
- photomultiplier — an extremely sensitive detector of light and of other radiation, consisting of a tube in which the electrons released by radiation striking a photocathode are accelerated, greatly amplifying the signal obtainable from small quantities of radiation.
- pneumatotherapy — the use of compressed or rarefied air in treating disease.
- pocket computer — palmtop
- poststimulatory — following stimulation
- poultry farming — breeding and keeping fowl
- pre-consumption — the act of consuming, as by use, decay, or destruction.
- primary product — a product consisting of a natural raw material; an unmanufactured product
- product manager — sb who oversees product development
- program counter — (hardware) (PC) A register in the central processing unit that contains the addresss of the next instruction to be executed. After each instruction is fetched, the PC is automatically incremented to point to the following instruction. It is not normally manipulated like an ordinary register but instead, special instructions are provided to alter the flow of control by writing a new value to the PC, e.g. JUMP, CALL, RTS.
- program picture — a motion picture produced on a low budget, usually shown as the second film of a double feature.
- protonephridium — a tubular, excretory structure in certain invertebrates, as flatworms, rotifers, and some larvae, usually ending internally in flame cells and having an external pore
- pseudo-dramatic — of or relating to the drama.
- pseudo-military — of, for, or pertaining to the army or armed forces, often as distinguished from the navy: from civilian to military life.
- pseudo-romantic — of, relating to, or of the nature of romance; characteristic or suggestive of the world of romance: a romantic adventure.
- pulmobranchiate — possessing a pulmobranch
- put a damper on — To put a damper on something means to have an effect on it which stops it being as enjoyable or as successful as it should be.
- quartz movement — an extremely accurate electronic movement utilizing the natural frequency of vibrations of a quartz crystal to regulate the operation of the timepiece (quartz clock or quartz watch)
- question master — quizmaster.
- quotation marks — one of the marks used to indicate the beginning and end of a quotation, in English usually shown as “ at the beginning and ” at the end, or, for a quotation within a quotation, of single marks of this kind, as “He said, ‘I will go.’ ” Frequently, especially in Great Britain, single marks are used instead of double, the latter being then used for a quotation within a quotation.
- rational number — a number that can be expressed exactly by a ratio of two integers.
- redocumentation — The creation or revision of a semantically equivalent representation within the same relative abstraction level. The resulting forms of representation are usually considered alternate views intended for a human audience.
- regulation time — the standard duration of a sports game, before the addition of any extra time to determine a winner, etc
- remuera tractor — a four-wheel drive vehicle
- resurrectionism — the exhumation and stealing of dead bodies, especially for dissection.
- rheumatism-root — spotted wintergreen.