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21-letter words containing a, e, r, i, l, m

  • multichannel analyser — an electronic instrument, such as a pulse height analyser, that splits an input waveform into a large number of channels in accordance with a particular parameter of the input
  • multilayer perceptron — A network composed of more than one layer of neurons, with some or all of the outputs of each layer connected to one or more of the inputs of another layer. The first layer is called the input layer, the last one is the output layer, and in between there may be one or more hidden layers.
  • multiplex transmitter — a transmitter that sends signals by multiplex
  • negotiable instrument — order or promise to pay money
  • nightmare file system — Pejorative hackerism for Sun's Network File System (NFS). In any nontrivial network of Suns where there is a lot of NFS cross-mounting, when one Sun goes down, the others often freeze up. Some machine tries to access the down one, and (getting no response) repeats indefinitely. This causes it to appear dead to some messages (what is actually happening is that it is locked up in what should have been a brief excursion to a higher spl level). Then another machine tries to reach either the down machine or the pseudo-down machine, and itself becomes pseudo-down. The first machine to discover the down one is now trying both to access the down one and to respond to the pseudo-down one, so it is even harder to reach. This situation snowballs very quickly, and soon the entire network of machines is frozen - worst of all, the user can't even abort the file access that started the problem! Many of NFS's problems are excused by partisans as being an inevitable result of its statelessness, which is held to be a great feature (critics, of course, call it a great misfeature). ITS partisans are apt to cite this as proof of Unix's alleged bogosity; ITS had a working NFS-like shared file system with none of these problems in the early 1970s. See also broadcast storm.
  • nine-banded armadillo — an armadillo, Dasypus novemcinctus, of the southern U.S. to Argentina, having nine hinged bands of bony plates, the female of which usually gives birth to quadruplets that are always of the same sex.
  • non-maintainer upload — (operating system)   (NMU) A release of a Debian package by someone other than its usual maintainer. E.g. "The bug was fixed in a recent NMU."
  • non-repeating decimal — a decimal representation of any irrational number, having the property that no sequence of digits is repeated ad infinitum.
  • northumberland strait — the part of the Gulf of St. Lawrence that separates Prince Edward Island from New Brunswick and Nova Scotia, in SE Canada. About 200 miles (320 km) long; 9–30 miles (15–48 km) wide.
  • oil-in-water emulsion — An oil-in-water emulsion is a mixture in which an oily medicine is dispersed in water or other liquid.
  • one-dimensional array — (types)   An array with only one dimension; the simplest kind of array, consisting of a sequence of items ("elements"), all of the same type. An element is selected by an integer index that normally starts at zero for the first element and increases by one. The index of the last element is thus the length of the array minus one. A one-dimensional array is also known as a vector. It should not be confused with a list. In some languages, e.g. Perl, all arrays are one-dimensional and higher dimensions are represented as arrays of pointers to arrays (which can have different sizes and can themselves contain pointers to arrays and so on). A one-dimensional array maps simply to memory: the address of an element with index i is A(i) = A0 + i * s where A0 is the base address of the array and s is the size of storage used for each element, the "stride". Elements may be padded to certain address boundaries, e.g. machine words, to increase access speed, in which case the stride will be larger than the amount of data in an element.
  • operational amplifier — a high-gain, high-input impedance amplifier, usually an integrated circuit, that can perform mathematical operations when suitably wired.
  • operational semantics — (theory)   A set of rules specifying how the state of an actual or hypothetical computer changes while executing a program. The overall state is typically divided into a number of components, e.g. stack, heap, registers etc. Each rule specifies certain preconditions on the contents of some components and their new contents after the application of the rule. It is similar in spirit to the notion of a Turing machine, in which actions are precisely described in a mathematical way. Compuare axiomatic semantics, denotational semantics.
  • ophthalmia neonatorum — inflammation of the eyes of a newborn child due to an infectious disease, as gonorrhea, contracted during birth from the infected mother.
  • parliamentary inquiry — a question asked of the presiding officer of a parliament in relation to parliamentary law
  • partial reinforcement — the process of randomly rewarding an organism for making a response on only some of the occasions it makes it
  • performance appraisal — the assessment, at regular intervals, of an employee's performance at work
  • personalized medicine — an approach to the practice of medicine that uses information about a patient’s unique genetic makeup and environment to customize the patient's medical care to fit his or her individual requirements.
  • piezoelectric ceramic — any ceramic that exhibits piezoelectric properties.
  • ploughman's spikenard — a European plant, Inula conyza, with tubular yellowish flower heads surrounded by purple bracts: family Asteraceae (composites)
  • polarizing microscope — a microscope that utilizes polarized light to reveal detail in an object, used especially to study crystalline and fibrous structures.
  • prader-willi syndrome — a congenital condition characterized by obsessive eating, obesity, learning difficulties, and small genitalia
  • premature ejaculation — a male psychosexual disorder in which ejaculation occurs soon after the commencement of sexual intercourse.
  • prince rupert's metal — a brass composed of from about 60 to 85 percent copper and about 15 to 40 percent zinc, used to imitate gold.
  • privacy enhanced mail —
  • private member's bill — In Britain, a Private Member's Bill is a law that is proposed by a Member of Parliament acting as an individual rather than as a member of his or her political party.
  • probable maximum loss — Probable maximum loss is the maximum amount of loss that can be expected under normal circumstances.
  • propantheline bromide — a substance, C 2 3 H 3 0 BrNO 3 , used in the treatment of peptic ulcers.
  • public address system — loudspeaker
  • public-address system — a combination of electronic devices that makes sound audible via loudspeakers to many people, as in an auditorium or out of doors.
  • quantum teleportation — a hypothetical technique to instantly transfer properties from one quantum system to another without contact, or to transfer a quantum state to an arbitrarily distant location.
  • real operating system — (operating system, abuse)   The sort the speaker is used to. People from the BSDophilic academic community are likely to issue comments like "System V? Why don't you use a *real* operating system?", people from the commercial/industrial Unix sector are known to complain "BSD? Why don't you use a *real* operating system?", and people from IBM object "Unix? Why don't you use a *real* operating system?" See holy wars, religious issues, proprietary, Get a real computer!.
  • relational data model — (database)   (Or "relational model") A data model introduced by E.F. Codd in 1970, particularly well suited for business data management. In this model, data are organised in tables. The set of names of the columns is called the "schema" of the table. Here is an example table with the schema (account number, amount) and 3 lines. account number amount -------------- --------- 12343243546456 +30000.00 23149875245824 +2345.33 18479827492874 -123.25 The data can be manipulated using a relational algebra. SQL is a standard language for talking to a database built on the relational model (a "relational database").
  • relative permeability — the ratio of the permeability of a medium to that of free space
  • relative permittivity — Electricity. the ratio of the flux density produced by an electric field in a given dielectric to the flux density produced by that field in a vacuum.
  • replacement algorithm — The method used to determine which entry in an associative cache to flush to main memory when it is desired to cache a new block of data. The "least recently used" algorithm flushed the block which has not been accessed for the longest time. A random replacement algorithm picks any block with equal probability.
  • requirements analysis — (project)   The process of reviewing a business's processes to determine the business needs and functional requirements that a system must meet.
  • residual unemployment — the unemployment that remains in periods of full employment, as a result of those mentally, physically, or emotionally unfit to work
  • salam-weinberg theory — the electroweak theory.
  • san gabriel mountains — a mountain range in S California, N of Los Angeles. Highest peak, San Antonio Peak, 10,080 feet (3072 meters).
  • secure hash algorithm —
  • semantic differential — a technique for measuring the connotative meaning of concepts by having an individual rate each concept on a series of graduated scales, each scale defined by a pair of polar adjectives, as good–bad or strong–weak.
  • sierra madre oriental — the system of mountains in the east of Mexico
  • simple actor language — (language)   (SAL) A minimal actor language, used for teaching in:
  • sir william alexander — Sir William (Alexander) 1867–1957, Scottish lexicographer and philologist.
  • slatwall merchandiser — A slatwall merchandiser is a three-dimensional display unit with grooves cut into its surface into which metal hanging rails can be fixed at various heights.
  • special court-martial — a court-martial established to try violations of military law less serious than those tried by a general court-martial but more serious than those tried by a summary court-martial.
  • spin angular momentum — to make (yarn) by drawing out, twisting, and winding fibers: Pioneer women spun yarn on spinning wheels.
  • splice the main brace — to join together or unite (two ropes or parts of a rope) by the interweaving of strands.
  • stem-and-leaf diagram — a histogram in which the data points falling within each class interval are listed in order
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