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READ THESE ARTICLES### adjective

1Having the shape of a cube.

*‘a cubic room’**‘There's nothing new about his style, for it reminds me of Andri Masson's painting, especially the way he strokes the brush and plays with cubic shapes.’**‘There are also a few huge boulders which were chiselled into cubic shapes centuries ago and now serve as surreal houses and stables.’**‘They usually were of cubic shape, and were sealed with an airtight lock that ran three-quarters of the way around the middle of the box, leaving one side to hinge on.’**‘La Defense is a strikingly modern part of Paris, dominated by the gleaming cubic shape of the Arche de la Defense.’**‘Almost square in plan, the mosque has a flat roof, making it cubic in shape.’**‘Like the others, the cubic room had two small beds, two desks, a row of different robes hanging from hooks, and a band of light-refracting crystal lining the wall.’**‘When the offending device had finally been removed, she didn't notice even then; her mind had been made as pure as the cubic room she was contained in.’**‘Even though there was a complete absence of light, somehow Terry knew that he was in a cubic room, and there was no way to get out.’**‘The food had been made into small rectangular, spherical or cubic portions, in contrast to those consumed by American or Russian astronauts, who sucked food from tube-type containers.’**‘Into this cubic void, subsidiary planes of glass are placed so that the immediate lobby reads as a transparent box inside a larger, virtual box.’**‘The upper portion of the portal is formed by a composition of squares and cubic inscriptions in carved relief.’**‘The main villain is Doctor Cube, who wears a white cubic helmet with a frowning visage that resembles an embittered smiley face.’**‘Located in a sprawling storefront loft on Sherbrooke just west of St-Denis, the glass-fronted cubic space with ultra-high ceilings has a museum-of-the-future feel to it.’**‘The main corridor then leads past two shops featuring clothing, perfumes, jewelry and souvenirs, and a double row of cubic insets displaying colorful Greek rocks and gems.’**‘This ratio, one of his own devising, has remained virtually constant in all of his cubic openwork structures.’**‘That was too familiar and so were the cubic structures that rose out of the ground.’**‘The five-story addition echoes the existing cubic structure and is connected to it by a two-story link that will house several galleries and public spaces.’**‘The cool rationality of the grid spells order and control - no mysterious darkness or dirty corners - and the geometry of the cubic masses registers timeless perfection.’**‘It turns out that these metal-organic building blocks crystallize in the form of a three-dimensional grid with very large cubic cavities.’**‘The work is described as a large cubic structure that can be triggered by a control unit to affect the earth's speed of rotation.’*

**quadrilateral**, rectangular, oblong, right-angled, at right angles, perpendicular- 1.1Denoting a crystal system or three-dimensional geometrical arrangement having three equal axes at right angles.
*‘the sodium and chloride ions form two intersecting cubic structures’**‘She noted that many dark purple to nearly black cubic crystals exhibit a stairstep growth pattern.’**‘Another relatively new discovery is pyrite as attractive, sharp, cubic crystals, to 1 cm on edge, altered to goethite.’**‘Groups of well-formed octahedrally modified cubic crystals were found, with individuals to 3.5 cm across.’**‘Although it exhibits cubic crystal symmetry, its optical behavior is not identical in all orientations.’**‘Diamonds, pyrite and garnet are examples of cubic crystals.’**‘Single brilliant, striated, cubic crystals to 2.5 cm on edge were found in soft greasy masses of pyrophyllite that was easily removed from the specimens.’**‘The Lena River in Yakutsk, Russia, is another classic source of cubic crystals.’**‘At this temperature the lattice constant of the cubic structure progressively decreases with increasing temperature.’**‘During the last four years we made several unsuccessful attempts to locate additional groups of cubic copper crystals.’**‘Diamond is also a light material whose atoms are covalently bonded and arrayed in a cubic structure, whereas osmium is heavy, metallic, and has hexagonally organized atoms.’**‘Based on x-ray diffraction data, the authors concluded that the observed aggregates represented dispersed particles of cubic structure.’**‘Between 417°C and its melting point of 1493°C, cobalt has a face-centered cubic structure.’**‘Suppose a walker stands at a vertex of a three-dimensional cubic grid.’**‘Most of these specimens exhibit crystals that are cubic in habit; however, octahedra of both blue-gray and medium green have also been common.’**‘Exceptionally sharp groups of skeletal cubic silver crystals have been collected from surface exposures near the Copper Falls mine.’**‘Some of the gold formed discrete isolated crystals to 2 mm perched on tiny cubic pyrite crystals in vugs that range to 1 cm across.’**‘Some of these larger crystals are elongate, giving them a tetragonal rather than cubic appearance.’**‘Sphalerite is cubic with crystals commonly tetrahedral or dodecahedral and frequently complex and distorted.’**‘When sufficient alloying element is added, it is possible to preserve the face-centered cubic austenite at room temperature, either in a stable or metastable condition.’**‘Table salt, for example, has a characteristically cubic crystalline shape that can be observed with the naked eye.’*

2Denoting a unit of measurement equal to the volume of a cube whose side is one of the linear units specified.

*‘15 billion cubic metres of water’**‘At 4:35 pm, the flow volume reached 750 cubic metres per second.’**‘A 737 freighter can carry about 16 tonnes, and has about 120 cubic metres of volume.’**‘The pool takes up a volume of 66 cubic metres and weighs over 80 metric tons.’**‘Basra's water authority is constructing 12 small purification units that will eventually produce 25 cubic meters of clean water every hour.’**‘For eight months up to eight Russian and international volunteers at a time called their combined 300 cubic metre volume home.’**‘Webster's would say that volume is the amount of space occupied by a three-dimensional figure as measured in cubic units.’**‘Other units, such as cubic meters or imperial gallons, can be converted to the U.S. barrel fairly easily.’**‘They sprayed the flow with 6 million cubic meters of water, hoping to cool the lava enough - by about 50 degrees Celsius - so that it would solidify.’**‘The Adamstown Treatment Plant, at Kilmeaden will be duplicated, thus increasing its output capacity from 32,500 to 53,000 cubic metres of water per day.’**‘Two thousand Vietnamese rivers carry nearly a trillion cubic meters of water to the sea every year, fed by rains that in some parts of the country total an astonishing 10 feet a year.’**‘The treatment plant currently processes 1.2 million cubic metres of water a day, representing 40 per cent of the total water used in Hong Kong each day.’**‘It is estimated that a million cubic meters of water is capable of creating 200 jobs in direct and indirect agriculturally generated occupations.’**‘As the earth's crust was forced upwards, it displaced hundreds of cubic metres of water along an area as large as 1000 km long and 100 km wide.’**‘Lacking some 2.6 billion cubic metres of water a year, Shaanxi Province is suffering from insufficient rainfall and a low water utilization ratio.’**‘This waterfall is over 1,700 meters wide and drops an average of 550,000 cubic meters of water over the edge every minute.’**‘The per capita availability of water was 6,008 cubic metres in 1947.’**‘One cubic metre of spruce weighs about 450 kilograms.’**‘Bailing of the waste plastic will take place on site and each bail will measure about one cubic metre.’**‘The price of the gas in Shanghai will be 1.32 yuan per cubic metre.’**‘Let us consider the density of the egg to be 1.3 grams per cubic centimeter.’*

3Involving the cube (and no higher power) of a quantity or variable.

*‘a cubic equation’**‘The first person known to have solved cubic equations algebraically was del Ferro but he told nobody of his achievement.’**‘Lagrange's main object was to find out why cubic and quartic equations could be solved algebraically.’**‘He solved cubic equations by extending an algorithm for finding cube roots.’**‘Like Mazur, Pesic starts at the beginning with the irrationality of square roots and proceeds to the solution of cubic and quartic equations.’**‘Khayyam also wrote that he hoped to give a full description of the algebraic solution of cubic equations in a later work.’**‘Historically, imaginary numbers first came to light when trying to solve cubic equations, rather than quadratics.’**‘We are told that there are similar formulae for roots of cubic and quartic polynomial equations, but these are more complicated, and so, in school we are not taught these formulas.’**‘What are the general solutions to cubic and quartic polynomial equations?’*

### noun

MathematicsA cubic equation, or a curve described by one.

*‘After subsequent work failed to solve equations of higher degree, Lagrange undertook an analysis in 1770 to explain why the methods for cubics and quartics are successful.’**‘In this classification of cubics, Newton gives four classes of equation.’**‘He wrote articles on such diverse topics as twisted cubics, developable surfaces, the theory of conics, the theory of plane curves, third- and fourth-degree surfaces, statics and projective geometry.’**‘Cardan noticed something strange when he applied his formula to certain cubics.’**‘The yield and tensile strengths of metals that crystallize in the body-centered cubic from iron, molybdenum, vanadium and chromium depend greatly on temperature.’*

**Origin**

Late 15th century (in the sense ‘involving the cube (and no higher power)’): from Old French cubique, or via Latin from Greek kubikos, from kobos ‘cube’.

**Pronunciation**

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