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22-letter words containing r, o

  • manhattan clam chowder — a chowder made from clams, tomatoes, and other vegetables and seasoned with thyme.
  • manner of articulation — the degree of obstruction or the type of channel imposed upon the passage of air at a given place of articulation, as denoted by such categories as stop, fricative, nasal, and semivowel.
  • master warrant officer — a noncommissioned officer in the Canadian forces junior to a chief warrant officer
  • matrix math extensions — (processor)   (MMX) (NOT an acronym for "MultiMedia eXtension", according to Intel, but an Intel brand name) A set of 57 extra instructions built into some versions of Intel's Pentium microprocessors for supporting SIMD operations on multimedia and communications data types. MMX-enhanced processors are due to be released early in 1997. They will be fully compatible with previous Intel processors and software but software will only benefit if it is written to use the new instructions. They can handle many common multimedia operations, such as digital signal processing, normally handled by a separate sound card or video card.
  • maxwell air force base — U.S. Air Force installation in SE central Alabama, NW of Montgomery: site of U.S. Air Force Advanced School.
  • mcculloch-pitts neuron — (artificial intelligence)   The basic building block of artificial neural networks. It receives one or more inputs and produces one or more identical outputs, each of which is a simple non-linear function of the sum of the inputs to the neuron. The non-linear function is typically a threshhold or step function which is usually smoothed (i.e. a sigmoid) to facilitate learning.
  • mecklenburg-vorpommern — German name of Mecklenburg–Western Pomerania.
  • memory management unit — (hardware, memory management)   (MMU, "Paged Memory Management Unit", PMMU) A hardware device or circuit that supports virtual memory and paging by translating virtual addresses into physical addresses. The virtual address space (the range of addresses used by the processor) is divided into pages, whose size is 2^N, usually a few kilobytes. The bottom N bits of the address (the offset within a page) are left unchanged. The upper address bits are the (virtual) page number. The MMU contains a page table which is indexed (possibly associatively) by the page number. Each page table entry (PTE) gives the physical page number corresponding to the virtual one. This is combined with the page offset to give the complete physical address. A PTE may also include information about whether the page has been written to, when it was last used (for a least recently used replacement algorithm), what kind of processes (user mode, supervisor mode) may read and write it, and whether it should be cached. It is possible that no physical memory (RAM) has been allocated to a given virtual page, in which case the MMU will signal a "page fault" to the CPU. The operating system will then try to find a spare page of RAM and set up a new PTE to map it to the requested virtual address. If no RAM is free it may be necessary to choose an existing page, using some replacement algorithm, and save it to disk (this is known as "paging"). There may also be a shortage of PTEs, in which case the OS will have to free one for the new mapping. In a multitasking system all processes compete for the use of memory and of the MMU. Some memory management architectures allow each process to have its own area or configuration of the page table, with a mechanism to switch between different mappings on a process switch. This means that all processes can have the same virtual address space rather than require load-time relocation. An MMU also solves the problem of fragmentation of memory. After blocks of memory have been allocated and freed, the free memory may become fragmented (discontinuous) so that the largest contiguous block of free memory may be much smaller than the total amount. With virtual memory, a contiguous range of virtual addresses can be mapped to several non-contiguous blocks of physical memory. In early designs memory management was performed by a separate integrated circuit such as the MC 68851 used with the Motorola 68020 CPU in the Macintosh II or the Z8015 used with the Zilog Z80 family of processors. Later CPUs such as the Motorola 68030 and the ZILOG Z280 have MMUs on the same IC as the CPU.
  • merry wives of windsor — a comedy (1598–1602?) by Shakespeare.
  • microspectrophotometer — a spectrophotometer for examining light emitted, transmitted, or reflected by minute objects.
  • microspectrophotometry — a spectrophotometer for examining light emitted, transmitted, or reflected by minute objects.
  • microwave spectroscopy — the determination of those frequencies of the microwave spectrum that are selectively absorbed by certain materials, providing information about atomic, molecular, and crystalline structure.
  • miguel primo de rivera — Diego [dye-gaw] /ˈdyɛ gɔ/ (Show IPA), 1886–1957, Mexican painter.
  • million electron volts — a unit of energy equal to the energy acquired by an electron in falling through a potential of 10 6 volts. Abbreviation: MeV .
  • mind your own business — an occupation, profession, or trade: His business is poultry farming.
  • mind-your-own-business — baby's-tears.
  • miscarriage of justice — law: wrongful judgement
  • missing persons bureau — the part of the Police Force dealing with tracing missing people
  • mistress of ceremonies — a woman who directs the entertainment at a party, dinner, or the like.
  • modified american plan — (in hotels) a system of paying a single fixed rate that covers room, breakfast, and one other meal, usually dinner. Abbreviation: MAP.
  • mohammed al-khawarizmi — Muhammad ibn Musa al-Khwarizmi
  • molecular distillation — a vacuum distillation in which the molecules of the distillate reach the condenser before colliding with one another.
  • monday morning disease — azoturia (def 2).
  • mother carey's chicken — any of various small petrels, especially the stormy petrel, Oceanites oceanicus.
  • motorcycle combination — a motorcycle with a sidecar attached
  • motoring correspondent — a journalist who reviews and writes about cars
  • mountain standard time — one of the standard times used in North America, seven hours behind Greenwich Mean Time
  • mpeg-2 aac low profile — (compression, standard, algorithm, file format)   A successor of MP3 allowing transparent coding at data rates of 75-80% of that of MP3. It is very different from MP3, only used MDCT, no subband coding.
  • mpeg-2.5 audio layer 3 — (compression, standard, algorithm, file format)   A non-standard extention of MPEG-2 audio layer 3 by FhG for lowest sampling rates (8-12 kHz) targeting bit rates from 16-32 kbps (possibly 8-160 kbps).
  • mutton dressed as lamb — If you describe a woman as mutton dressed as lamb, you are criticizing her for trying to look younger than she really is, in a way that you consider unattractive.
  • nassella tussock board — one of many local statutory organizations set up in different regions of New Zealand to eradicate the invasive nassella tussock weed
  • national semiconductor — (company)   A semiconductor manufacturer, responsible for the SC/MP, National Semiconductor 16000 and National Semiconductor 32000 series of microprocessors.
  • natural classification — classification of organisms according to relationships based on descent from a common ancestor
  • negative reinforcement — form of conditioning
  • neighborhood bike code — (humour, programming)   A piece of code that every programmer at the company has touched.
  • neither here nor there — in this place; in this spot or locality (opposed to there): Put the pen here.
  • network interface card — network interface controller
  • network node interface — (networking)   (NNI) The ATM Forum's specification for connections between network nodes. NNI makes network routing possible. It typically refers to backbone trunk connections between ATM switching equipment. See also: UNI.
  • new zealand greenstone — a variety of nephrite from New Zealand, used as a gemstone
  • nicky nicky nine doors — the practice of knocking on a door or ringing a doorbell and running away before it is answered
  • nigger in the woodpile — a hidden snag or hindrance
  • nitrohydrochloric acid — aqua regia.
  • nkosi sikelel' iafrica — the unofficial anthem of the Black people of South Africa, officially recognized as a national anthem (along with parts of 'Die Stem' and an English verse) in 1991
  • nkosi sikelel' iafrika — the unofficial anthem of the Black people of South Africa, officially recognized as a national anthem (along with parts of 'Die Stem' and an English verse) in 1991
  • no room to swing a cat — If you say 'There's no room to swing a cat' or 'You can't swing a cat', you mean that the place you are talking about is very small or crowded.
  • nominal semidestructor — (abuse)   Slang for "National Semiconductor", found among other places in the 4.3BSD networking sources. During the late 1970s to mid-1980s this company marketed a series of microprocessors including the National Semiconductor 16000 and National Semiconductor 32000. At one point early in the great microprocessor race, the specs on these chips made them look like serious competition for the rising Intel 80x86 and Motorola 680x0 series. Unfortunately, the actual parts were notoriously flaky and never implemented the full instruction set promised in their literature, apparently because the company couldn't get any of the mask steppings to work as designed. They eventually sank without trace, joining the Zilog Z8000 and a few even more obscure also-rans in the graveyard of forgotten microprocessors.
  • non-constructive proof — (logic)   (Or "existence proof") A proof that something exists that does not provide an example of that thing or a method for finding an example. (A constructive proof does provide such an example or method). For example, for any pair of finite real numbers n < 0 and p > 0 there exists a real number 0 < k < 1 such that f(k) = (1-k)*n + k*p = 0. A non-constructive proof might proceed by observing that as k changes continuously from 0 to 1, f(k) changes continuously from n to p and, since they lie either side of zero, f(k) must pass through zero for some intermediate value of k. This proof does not tell us what that value of k is, only that it exists.
  • non-euclidean geometry — geometry based upon one or more postulates that differ from those of Euclid, especially from the postulate that only one line may be drawn through a given point parallel to a given line.
  • non-maskable interrupt — (NMI) An IRQ 7 on the PDP-11 or 680x0 or the NMI line on an 80x86. In contrast with a priority interrupt (which might be ignored, although that is unlikely), an NMI is *never* ignored.
  • non-restrictive clause — a relative clause that describes or supplements but is not essential in establishing the identity of the antecedent and is usually set off by commas in English. In This year, which has been dry, is bad for crops the clause which has been dry is a nonrestrictive clause.
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