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Meteorite
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Abzyme
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Asymptotic giant branch
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Tarsus
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Endoreduplication
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Planetographic Coordinates
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Optical doublet
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Systematic
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Sun-synchronous
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RFC
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Aragonite
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Asbestos
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Oceanic zone
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Proteolysis
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Magnetisation
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Species
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Haemorrhoids
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Microclimate
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Rotator cuff
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Catabolism
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Eris
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Scour pool
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Geological storage
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Endoprosthesis
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Volcanic arc
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RC2
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Meridian of a celestial body
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Water
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Chemical pollution
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Aerophagia
pH
Hydrogen potential. pH is an index measuring the hydrogen ion activity in a solution. It is an indicator of the acidity (pH lower than 7) or alkalinity (pH higher than 7) of a solution.
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