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17-letter words containing a, l, t, m

  • mechanical tissue — a plant tissue made up of hard, thick-walled cells that add strength to an organ
  • mechanoelectrical — Describing the production of electricity by mechanical motion; especially in a transducer.
  • medulla oblongata — the lowest or hindmost part of the brain, continuous with the spinal cord.
  • megaelectron volt — million electron volts.
  • memetic algorithm — (algorithm)   A genetic algorithm or evolutionary algorithm which includes a non-genetic local search to improve genotypes. The term comes from the Richard Dawkin's term "meme". One big difference between memes and genes is that memes are processed and possibly improved by the people that hold them - something that cannot happen to genes. It is this advantage that the memetic algorithm has over simple genetic or evolutionary algorithms. These algorithms are useful in solving complex problems, such as the "Travelling Salesman Problem," which involves finding the shortest path through a large number of nodes, or in creating artificial life to test evolutionary theories. Memetic algorithms are one kind of metaheuristic. (07 July 1997)
  • mensural notation — a system of musical notation of the 13th to the late 16th centuries, marked by the use of note symbols such as the longa and brevis, the absence of bar lines and ties, and the equivalence in value of one note to either two or three of the next smaller degree.
  • mental arithmetic — sums done in your head
  • mental deficiency — mental retardation
  • mental disability — a general or specific intellectual handicap, resulting directly or indirectly from injury to the brain or from abnormal neurological development
  • mental impairment — (in England, according to the Mental Health Act 1983) a state of arrested or incomplete development of mind, which includes significant impairment of intelligence and social functioning and is associated with abnormally aggressive or seriously irresponsible conduct
  • mentally impaired — with reduced or weakened mental capacity
  • mercantile agency — commercial agency.
  • mercantile marine — the merchant navy
  • mercantile system — a system of political and economic policy, evolving with the modern national state and seeking to secure a nation's political and economic supremacy in its rivalry with other states. According to this system, money was regarded as a store of wealth, and the goal of a state was the accumulation of precious metals, by exporting the largest possible quantity of its products and importing as little as possible, thus establishing a favorable balance of trade.
  • messier catalogue — a catalogue of 103 nonstellar objects, such as nebulae and galaxies, prepared in 1781–86. An object is referred to by its number in this catalogue, for example the Andromeda Galaxy is referred to as M31
  • meta class system — (language)   (MCS) A portable object-oriented extension of Common Lisp from GMD. It integrates the functionality of CLOS and TELOS.
  • metabolic pathway — biochemistry: sequence of reactions within a cell or organism
  • metallofullerenes — Plural form of metallofullerene.
  • metalloproteinase — (enzyme) Any of several proteinases that have a metal atom (often zinc) at their active centre.
  • methemoglobinemia — (medicine) A form of toxic anemia characterized by the presence of methemoglobin in the blood.
  • methyl isocyanate — Chemistry. a highly toxic, flammable, colorless liquid, CH 3 NCO, used as an intermediate in the manufacture of pesticides: in 1984, the accidental release of a cloud of this gas in Bhopal, India, killed more than 1700 people and injured over 200,000.
  • methyl salicylate — a colorless, water-soluble liquid, C 8 H 8 O 3 , produced synthetically or by maceration and subsequent distillation from birch or gaultheria: used chiefly in perfumery and flavoring, and in medicine as a counterirritant in external preparations.
  • methylacetic acid — propionic acid.
  • methylnaphthalene — a compound, C 1 1 H 1 0 , whose alpha isomer, a colorless liquid, is used in determining cetane numbers.
  • methyltransferase — any of a class of enzymes that catalyze the transfer of methyl groups from one molecule to another.
  • microdistillation — the distillation of minute quantities of material.
  • microencapsulated — Encapsulated using microencapsulation.
  • microevolutionary — Of or pertaining to microevolution.
  • micromanipulation — the technique of performing mechanical operations under high magnification through the use of specialized tools.
  • micromanipulators — Plural form of micromanipulator.
  • micropaleontology — the branch of paleontology dealing with the study of microscopic fossils.
  • middle management — the middle echelon of administration in business and industry.
  • midsagittal plane — a plane passing through the nasion when the skull is oriented in the Frankfurt horizontal.
  • mileage indicator — a device on a vehicle such as a car, plane, etc which indicates the number of miles travelled
  • militant tendency — (in Britain) a Trotskyist group formerly operating within the Labour Party
  • military covenant — the supposed understanding that members of the armed forces and their families will be supported by the state in the event of injury or death in the course of duty
  • military governor — the military officer in command of a military government.
  • military training — drilling in army discipline and techniques
  • mineralocorticoid — Biochemistry. any of a group of corticosteroid hormones, synthesized by the adrenal cortex, that regulate the excretion or reabsorption of sodium and potassium by the kidneys, salivary glands, and sweat glands.
  • minimal automaton — (theory)   An automaton possessing with redundant states.
  • minion of the law — a policeman.
  • ministering angel — a spirit who is believed to look after the needs of a particular person or group
  • miss lonelyhearts — a novel (1933) by Nathanael West.
  • mississippi delta — an area between the Mississippi and Yazoo rivers in the northwest of the state of Mississippi; it is very flat and fertile
  • misunderstandable — Capable of being misunderstood.
  • mitochondrial dna — DNA found in mitochondria, which contains some structural genes and is generally inherited only through the female line
  • modern pentathlon — an athletic contest consisting of five different events: horse riding with jumps, fencing with electric épée, freestyle swimming, pistol shooting, and cross-country running
  • modulo arithmetic — modular arithmetic
  • molecular orbital — Physics, Chemistry. a wave function describing the state of a single electron in an atom (atomic orbital) or in a molecule (molecular orbital) the electron in that state.
  • monarch butterfly — a large, deep-orange butterfly, Danaus plexippus, having black and white markings, the larvae of which feed on the leaves of milkweed.
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