单词 | centre of percussion |
释义 | centre or (N American) center, etc /senˈtər/noun
Relating to the political centre ORIGIN: Fr, from L centrum, from Gr kentron a sharp point cenˈtral adjective
cenˈtralism noun The tendency or policy of administering by the sovereign or central government matters which would be otherwise under local management cenˈtralist noun (also adjective) centrality /-tralˈi-ti/ noun
centralizāˈtion or centralisāˈtion noun
cenˈtralize or cenˈtralise transitive verb and intransitive verb To move to, draw to, or concentrate at a centre cenˈtrally adverb cenˈtred adjective
cenˈtreing noun see separate entry centring cenˈtric adjective
Having a specified type of centre cenˈtrical adjective cenˈtrically adverb cenˈtricalness noun centricity /-trisˈi-ti/ noun cenˈtrism noun
cenˈtrist adjective and noun central angle noun (mathematics) An angle bounded by two radii of a circle central bank noun A bank, usu state-owned or state-controlled, which carries out government financial policy, regulates the money supply, influences interest rates and acts as a link between the government and the banking system central conic noun A conic section that has a centre central dogma noun The principle that the transfer of genetic information from DNA to the protein sequence is irreversible, ie it cannot flow from protein to DNA Central European Time noun One of the standard times used in Europe, being 1 hour ahead of Greenwich Mean Time (abbrev CET) central fire noun A cartridge having the fulminate in the centre of the base (cenˈtre-fire adjective) central force noun (physics) The force on a moving body that is always directed towards or from a fixed point, the centre of force central government noun The government controlling a whole country, as opposed to local government central heating noun A system of heating a building by water, steam or warm air conducted throughout the building from one point central locking noun In a motor vehicle, the automatic locking of all the doors as the driver's door is locked cenˈtrally-heated adjective central nervous system noun (zoology) The main ganglia of the nervous system with their associated nerve cords, in vertebrates consisting of the brain and spinal cord Central Powers plural noun In and before the war of 1914–18, the German Empire and Austria-Hungary central processor or central processing unit noun The part of a computer which performs the logical and arithmetical operations on the data and which controls other units of the computer system (abbrev CPU) central reservation noun A usu tarred or paved area in the centre of a motorway or major road acting as a division between traffic travelling in opposite directions Central Standard Time or Central Time noun One of the standard times used in N America, being 6 hours behind Greenwich Mean Time (abbrev CST or CT) cenˈtre-back noun (football)
centre bit noun A joiner's tool, turning on a centre, for boring circular holes in wood cenˈtreboard noun A retractable keel fitted to small racing yachts and dinghies centre-fire see central fire above. cenˈtrefold or centre spread noun
centre-forˈward noun (football, hockey, etc)
centre-halfˈ noun (football, hockey, etc)
centre lathe noun (engineering) A machine tool for cutting metal in which the tool is held steady and the workpiece rotates cenˈtreline noun An often imaginary line that divides a body or shape into two equal halves cenˈtrepiece noun
centre punch noun A tool, a steel bar with a conical point, used for marking the centre of holes to be drilled cenˈtre-rail noun A rail between the ordinary rails on a railway track centre spread see centrefold above. centre stage adjective and adverb
central to Essential, most important for the understanding or working of centre of attraction The point to which bodies tend by the force of gravity or the like centre of buoyancy or displacement The centre of mass of liquid displaced by an immersed body centre of curvature (of a curve) the centre of the circle which can be superimposed on it on the concave side centre of excellence A focal point, esp a university (or one of its departments), for work at the highest level (in a particular subject) centre of gravity The single point at which the resultant gravitational forces of a body act centre of inertia or mass (physics) The point in an assembly of mass particles where the entire mass of the assembly may be regarded as being concentrated centre of oscillation The point in a pendulum such that, if all the matter were concentrated there, the pendulum would have the same period centre of percussion The point where the direction of a blow meets the plane in which lie the centre of inertia and a possible axis of rotation such that the blow imparts a rotation without pressure on the axis centre of pressure
centre of symmetry A point in a figure such that any straight line through it meets the figure in two points at equal distances on either side |
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