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20-letter words containing a, h, m

  • matched-pairs design — (of an experiment) concerned with measuring the values of the dependent variables for pairs of subjects that have been matched to eliminate individual differences and that are respectively subjected to the control and the experimental condition
  • maternal health care — care for the health of a pregnant woman provided by a hospital or health centre
  • mean something to sb — If a name, word, or phrase means something to you, you have heard it before and you know what it refers to.
  • measure one's length — to fall, lie, or be thrown down at full length
  • mechanical advantage — the ratio of output force to the input force applied to a mechanism.
  • mechanical impedance — impedance (def 2).
  • mechanical-impedance — Electricity. the total opposition to alternating current by an electric circuit, equal to the square root of the sum of the squares of the resistance and reactance of the circuit and usually expressed in ohms. Symbol: Z.
  • membranous labyrinth — an intricate combination of paths or passages in which it is difficult to find one's way or to reach the exit. Synonyms: maze, network, web.
  • meta-dichlorobenzene — a colorless liquid, C 6 H 4 Cl 2 , soluble in alcohol and ether: used as a fumigant and insecticide.
  • methyl chloroformate — a colorless liquid, C 2 H 3 ClO 2 , used chiefly in organic synthesis.
  • methylbenzyl acetate — methylphenylcarbinyl acetate.
  • mischaracterizations — Plural form of mischaracterization.
  • moreton bay chestnut — an Australian leguminous tree, Castanospermum australe, having thin smooth bark and yellow or reddish flowers: used in furniture manufacture
  • mother of the chapel — (in British trade unions in the publishing and printing industries) a woman shop steward
  • mother-of-pearl moth — a pyralid moth, Pleuroptya ruralis, having a pale sheen, that is often seen around nettles, on which its green larvae feed
  • multiple inheritance — (programming)   In object-oriented programming, the possibility that a class may have more than one direct superclass in the class hierarchy. The opposite is single inheritance.
  • multistep hydroplane — a motorship having a flat bottom built as a series of planes inclined forward, the ship planing on each from stem to stern as its speed increases.
  • near someone's heart — dear or important to someone
  • near-market research — scientific research that, while not linked to the development of a specific product, is likely to be commercially exploitable
  • new jerusalem church — a sect founded in 1787, based on Swedenborgianism
  • nineteenth amendment — an amendment to the U.S. Constitution, ratified in 1920, guaranteeing women the right to vote.
  • no lack of something — If you say there is no lack of something, you are emphasizing that there is a great deal of it.
  • north american plate — a major tectonic division of the earth's crust, comprising Greenland and the continent of North America and the suboceanic Labrador and North American Basins, and bounded on the east by the Mid-Atlantic Ridge, on the south by the Caribbean and South American Plates, and on the west by the San Andreas fault and Aleutian Trench.
  • north temperate zone — the part of the earth's surface between the tropic of Cancer and the Arctic Circle.
  • not have the stomach — If you have no stomach for something, you do not have the courage to do it.
  • old man of the woods — an edible, mild-tasting mushroom, Strobilomyces floccopus, occurring in coniferous woodlands of eastern North America.
  • one's spiritual home — Your spiritual home is the place where you feel that you belong, usually because your ideas or attitudes are the same as those of the people who live there.
  • ophthalmodynamometer — a device for determining the nearest point of ocular convergence.
  • orthopaedic mattress — a specially firm mattress designed to help correct or ameliorate the discomfort of disorders of the spine and joints
  • pan-american highway — a road system proposed in the 1920s linking nations of the Western Hemisphere, extending from Alaska to Santiago, Chile, with some gaps remaining in Panama and Colombia. The section between Nuevo Laredo, Mexico and Panama City is known as the Inter-American Highway Total length about 16,000 miles (25,744 km).
  • paper chromatography — the separation of mixtures into their constituents by preferential adsorption by a solid, as a column of silica (column chromatography) or a strip of filter paper (paper chromatography) or by a gel.
  • pass the time of day — to exchange casual greetings (with an acquaintance)
  • paternal grandmother — the mother of someone's father
  • peremptory challenge — a formal objection to the service of a juror by a party to a criminal prosecution or a civil action that requires no showing of cause.
  • phenyldiethanolamine — a white, crystalline, slightly water-soluble substance, C 1 0 H 1 5 NO 2 , used in the manufacture of dyes and in organic synthesis.
  • physical examination — an examination, usually by a physician, of a person's body in order to determine his or her state of health or physical fitness, as for military service or participation in a sport.
  • physical meteorology — the branch of meteorology dealing with the study of optical, electrical, acoustical, and thermodynamic phenomena in the atmosphere, including the physics of clouds and precipitation.
  • play merry hell with — to disturb greatly; disrupt
  • poor man's something — a (cheaper) substitute for something
  • potassium bichromate — an orange-red, crystalline, water-soluble, poisonous powder, K 2 Cr 2 O 7 , used chiefly in dyeing, photography, and as a laboratory reagent.
  • potassium dichromate — an orange-red crystalline soluble solid substance that is a good oxidizing agent and is used in making chrome pigments and as a bleaching agent. Formula: K2Cr2O7
  • pseudoparenchymatous — (in certain fungi and red algae) a compact mass of tissue, made up of interwoven hyphae or filaments, that superficially resembles plant tissue.
  • psychological moment — the proper or critical time for achieving a desired result: She found the right psychological moment to make her request.
  • punch a (time) clock — to insert a timecard into a time clock when coming to or going from work
  • pythagoras's theorem — (mathematics)   The theorem of geometry, named after Pythagoras, of Samos, Ionia, stating that, for a right-angled triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides. I.e. if the longest side has length A and the other sides have lengths B and C (in any units), A^2 = B^2 + C^2 (2004-02-12)
  • quaker meeting house — a place where Quakers gather for worship
  • quantum cryptography — a method of coding information based on quantum mechanics, which is said to be unbreakable
  • quantum field theory — any theory in which fields are treated by the methods of quantum mechanics; each field can then be regarded as consisting of particles of a particular kind, which may be created and annihilated.
  • raynaud's phenomenon — a secondary circulatory disorder, often associated with a primary vascular disease, characterized by changes of blood flow resulting in white, bluish, or red hands and feet
  • repurchase agreement — a contract between a dealer, as a bank, and an investor, whereby the investor purchases securities with the promise that they will be bought back by the dealer on a designated date, for which the investor receives a fixed return.
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