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Total unbundling
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Oil producing plant
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Ridge
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Vitelline sac
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Hiccups
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Ghost lineage
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Chalazion
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Cleavage
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Sidereal period
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Asteroid belt
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Mercury
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Zircon
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Crustacean
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Femur
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Ammeter
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Gas giant
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Domestication
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Gregorian calendar
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Palmer Drought Severity Index
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Polyunsaturated fatty acid
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Enteric
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Game reserve
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Anorexia
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Calamus
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W boson
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Powder acceleration stage
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Globular cluster
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Cyclosilicates
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Leukopenia
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Low molecular weight heparin
Iridescence
Iridescence is the ability of a body to disperse light in coloured rays (like a rainbow).
The wings of some butterflies change colour: this is iridescence. Here, a single lesser purple emperor photographed from different angles. © Jean-Jacques Feldtrauer
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