noun
a device used to measure the refractive index of a substance
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The scientist used an abbe refractometer to measure the refractive index of the liquid sample.
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I borrowed my friend's abbe refractometer to check the purity of the oil.
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I gotta get my hands on an abbe refractometer to test this stuff out.
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Using an abbe refractometer, she could see through the lies and deception.