English theoretical physicist who applied relativity theory to quantum mechanics and predicted the existence of antimatter and the positron (1902-1984)
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deciduous shrub of North America: leatherwood
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deciduous shrub of eastern North America having tough flexible branches and pliable bark and small yellow flowers
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causing fear or dread or terror
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fraught with extreme danger
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a state of extreme distress
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plan and direct (a complex undertaking)
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specifically design a product, event, or activity for a certain public