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Corti cell
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Vickers hardness index
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Melon
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Debye force
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Pyrophosphate bond
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Tidal range
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Mersenne prime
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Clone
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Chalcogen
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Spitzer
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Steganography
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Superplastic metal
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M44
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Biogeography
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ppm
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Gems
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Protease inhibitor
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Transpiration
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Okra
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Influenza virus
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Endosperm
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Catabolic agent
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Haemagglutinin
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Vacuum permeability
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Female condom
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M110
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Solar sail
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Java
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Drainage basin
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Growth factor
Crater
A crater is a depression generally located at the summit of a volcano, with more or less steep sides. When the diameter of a crater is greater than 2 km, we call it a caldera.
Crater
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