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Stalactite
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CRAB
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Tetragonal system
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Ethylene
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Coverts
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Quantum mechanics
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Aromatherapy
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Supervolcano
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Catalyst
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Lamellar
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Soft acid
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Metamict
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Ecological corridor
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Mid-oceanic ridge
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Crystalline schist
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Excoriation
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Toxoplasmosis
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Bearded seal
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Columnar
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Acini
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Neurite
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IPv6
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Fusiform
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Photovoltaic panel
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Galactocentric coordinate
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Browser
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Hydrothermal deposit
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Efflorescence
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Annual parallax
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Sodium
Fistula
A fistula is the abnormal formation of an opening or channel that communicates between an internal organ and the surface of the body, or between two organs.
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