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2017 Word of the Year

blue mass

noun, Pharmacology.
1.
Also called mercury mass. a preparation of metallic mercury and other ingredients, used for making blue pills.
2.
Origin of blue mass
1850-1855
An Americanism dating back to 1850-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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6
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