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 for Magnetic element
From The Collaborative International Dictionary of English v.0.48 :

  Element \El"e*ment\, n. [F. ['e]l['e]ment, L. elementum.]
     1. One of the simplest or essential parts or principles of
        which anything consists, or upon which the constitution or
        fundamental powers of anything are based.
        [1913 Webster]
     2. One of the ultimate, undecomposable constituents of any
        kind of matter. Specifically: (Chem.) A substance which
        cannot be decomposed into different kinds of matter by any
        means at present employed; as, the elements of water are
        oxygen and hydrogen.
        [1913 Webster]
     Note: The elements are naturally classified in several
           families or groups, as the group of the alkaline
           elements, the halogen group, and the like. They are
           roughly divided into two great classes, the metals, as
           sodium, calcium, etc., which form basic compounds, and
           the nonmetals or metalloids, as oxygen, sulphur,
           chlorine, which form acid compounds; but the
           distinction is only relative, and some, as arsenic,
           tin, aluminium, etc., form both acid and basic
           compounds. The essential fact regarding every element
           is its relative atomic number, which is equal to the
           number of protons in the nucleus, and also equal to the
           number of electrons in orbitals around the nucleus when
           the atom is neutral. When the elements are tabulated in
           the order of their ascending atomic numbers, the
           arrangement constitutes the series of the Periodic law
           of Mendelejeff. See Periodic law, under Periodic.
           This Periodic law enables us to predict the qualities
           of unknown elements. The number of elements known in
           1890 were about seventy-five, but at that time the gaps
           in the Periodic law indicated the possibility of many
           more. All of the elements up to atomic number 100 have
           now been observed though some are radioactive and very
           unstable, and in some cases cannot be accumulated in
           quantity sufficient to actually see by eye. The
           properties predicted by the periodic law wre close to
           the observed properties in many cases. Additional
           unstable elements of atomic number over 100 are
           observed from time to time, prepared in cyclotrons,
           particle acclerators, or nuclear reactors, and some of
           their properties are measurable by careful observation
           of microscopic quantities, as few as several atoms. For
           such unstable elements, the properties are now
           predicted primarily by calculations based on quantum
           mechanics. Such theories suggest that there may be an
           "island" of relative stability of elements of atomic
           number over 120, but this has yet to be confirmed by
           Many of the elements with which we are familiar, as
           hydrogen, carbon, iron, gold, etc., have been
           recognized, by means of spectrum analysis, in the sun
           and the fixed stars. The chemical elements are now
           known not be simple bodies, but only combinations of
           subatomic particles such as protons, neutrons, and
           electrons; ahd protons and neutrons are now believed to
           be themselves combinations of quarks, particles which
           are not observed singly, but only in combinations.
           In formulas, the elements are designated by
           abbreviations of their names in Latin or New Latin,
           given in the table below. The atomic weights given in
           the table below are the
     chemical atomic weights, in some cases being the weighted
        average of the atomic weights of individual isotopes, each
        having a different atomic weight. The atomic weight of the
        individual isotopes are called the physical atomic
        weights. In those few cases where there is only one stable
        isotope of an element, the chemical and physical atomic
        weights are the same. The mass-spectrometric atomic
        weights are those used for careful mass-spectrometric
        measurements. For more details about individual elements,
        see the element names in the vocabulary The Elements
        Name |Sym-| Atomic Weight |
        |bol | O=16 | H=1 | C=12.000
        Aluminum | Al | 27.1 | 26.9 |
        Antimony (Stibium) | Sb | 120 | 119.1 |
        Argon | A | 39.9 | 39.6 |
        Arsenic | As | 75 | 74.4 |
        Astatine | At |
        Barium | Ba | 137.4 | 136.4 |
        Beryllium | Be |
        Bismuth | Bi | 208.5 | 206.9 |
        Boron | B | 11 | 10.9 |
        Bromine | Br | 79.96 | 79.36|
        Cadmium | Cd | 112.4 | 111.6 |
        Cesium (Caesium) | Cs | 133 | 132 |
        Calcium | Ca | 40 | 39.7 |
        Carbon | C | 12 | 11.91| 12.000
        Cerium | Ce | 140 | 139 |
        Chlorine | Cl | 35.45 | 35.18|
        Chromium | Cr | 52.1 | 51.7 |
        Cobalt | Co |
        Columbium (see Beryllium)
        Copper | Cu |
        Erbium | Er |
        Europium | Eu |
        Einsteinium | Es |
        Fermium | Fe |
        Fluorine | F |
        Gadolinium | Gd |
        Gallium | Ga |
        Germanium | Ge |
        Glucinum (now Beryllium)
        Gold (Aurum) | Au |
        Helium | He |
        Hydrogen | H |
        Indium | In |
        Iodine | I |
        Iridium | Ir |
        Iron | Fe |
        Krypton | Kr |
        Lanthanum | La |
        Lead | Pb |
        Lithium | Li |
        Magnesium | Mg |
        Manganese | Mn |
        Mercury | Hg |
        Molybdenum | Mo |
        Neodymium | Nd |
        Neon | Ne |
        Nickel | Ni |
        Niobium | Nb |
        (see Columbium)
        Nitrogen | N |
        Osmium | Os |
        Oxygen | O |
        Palladium | Pd |
        Phosphorus | P |
        Platinum | Pt |
        Potassium | K |
        Praseodymium | Pr |
        Rhodium | Rh |
        Rubidium | Rb |
        Ruthenium | Ru |
        Samarium | Sa |
        Scandium | Sc |
        Selenium | Se |
        Silicon | Si |
        Silver | Ag |
        Sodium | Na |
        Strontium | Sr |
        Sulphur | S |
        Tantalum | Ta |
        Tellurium | Te |
        Thallium | Tl |
        Thorium | Th |
        Thulium | Tu |
        Tin | Sn |
        Titanium | Ti |
        Tungsten | W |
        Uranium | U |
        Vanadium | V |
        Wolfranium (see Tungsten)
        Xenon | X |
        Ytterbium | Yb |
        Yttrium | Y |
        Zinc | Zn |
        Zirconium | Zr |
        [1913 Webster]
     Note: Several other elements have been announced, as holmium,
           vesbium, austrium, etc., but their properties, and in
           some cases their existence, have not yet been
           definitely established.
           [1913 Webster]
     3. One of the ultimate parts which are variously combined in
        anything; as, letters are the elements of written
        language; hence, also, a simple portion of that which is
        complex, as a shaft, lever, wheel, or any simple part in a
        machine; one of the essential ingredients of any mixture;
        a constituent part; as, quartz, feldspar, and mica are the
        elements of granite.
        [1913 Webster]
              The simplicity which is so large an element in a
              noble nature was laughed to scorn.    --Jowett
        [1913 Webster]
        (a) One out of several parts combined in a system of
            aggregation, when each is of the nature of the whole;
            as, a single cell is an element of the honeycomb.
        (b) (Anat.) One of the smallest natural divisions of the
            organism, as a blood corpuscle, a muscular fiber.
            [1913 Webster]
     5. (Biol.) One of the simplest essential parts, more commonly
        called cells, of which animal and vegetable organisms, or
        their tissues and organs, are composed.
        [1913 Webster]
     6. (Math.)
        (a) An infinitesimal part of anything of the same nature
            as the entire magnitude considered; as, in a solid an
            element may be the infinitesimal portion between any
            two planes that are separated an indefinitely small
            distance. In the calculus, element is sometimes used
            as synonymous with differential.
        (b) Sometimes a curve, or surface, or volume is considered
            as described by a moving point, or curve, or surface,
            the latter being at any instant called an element of
            the former.
        (c) One of the terms in an algebraic expression.
            [1913 Webster]
     7. One of the necessary data or values upon which a system of
        calculations depends, or general conclusions are based;
        as, the elements of a planet's orbit.
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     8. pl. The simplest or fundamental principles of any system
        in philosophy, science, or art; rudiments; as, the
        elements of geometry, or of music.
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     9. pl. Any outline or sketch, regarded as containing the
        fundamental ideas or features of the thing in question;
        as, the elements of a plan.
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     10. One of the simple substances, as supposed by the ancient
         philosophers; one of the imaginary principles of matter.
         (a) The four elements were, air, earth, water, and fire;
     Note: whence it is said, water is the proper element of
           fishes; air is the element of birds. Hence, the state
           or sphere natural to anything or suited for its
           [1913 Webster]
                 Of elements
                 The grosser feeds the purer: Earth the Sea;
                 Earth and the Sea feed Air; the Air those Fires
                 Ethereal.                          --Milton.
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                 Does not our life consist of the four elements?
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                 And the complexion of the element [i. e.,the sky
                 or air]
                 In favor's like the work we have in hand,
                 Most bloody, fiery, and most terrible. --Shak.
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                 About twelve ounces [of food], with mere element
                 for drink.                         --Cheyne.
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                 They show that they are out of their element.
                                                    --T. Baker.
           Esp., the conditions and movements of the air. "The
           elements be kind to thee."
         (b) The elements of the alchemists were salt, sulphur,
             and mercury. --Brande & C.
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     11. pl. The whole material composing the world.
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               The elements shall melt with fervent heat. --2
                                                    Peter iii. 10.
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     12. pl. (Eccl.) The bread and wine used in the eucharist or
         Lord's supper.
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     Magnetic element, one of the hypothetical elementary
        portions of which a magnet is regarded as made up.
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