element
noun
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an artifact that is one of the individual parts of which a composite entity is made upcomponent
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an abstract part of somethingcomponent
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the most favorable environment for a plant or animal“water is the element of fishes”
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a straight line that generates a cylinder or cone
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the situation in which you are happiest and most effective“in your element”
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any of the more than 100 known substances, of which 92 occur naturally, that cannot be separated into simpler substances and that singly or in combination constitute all matter“Elements are fundamental in chemistry.”chemical element
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one of four substances thought in ancient and medieval cosmology to constitute the physical universe“the alchemists believed that there were four elements”