Definition of "grains" []

• Plural form of grain. (noun)
• Pigeons' dung used in tanning. See grainer. (noun)

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• "The distribution of the grains is at first uniform, but it is found that the grains accumulate progressively in the lower layers until a limiting distribution is reached with reversible settling or expansion depending on whether the temperature is lowered or raised."
• "Our agriculture, which depends so largely now upon those members of the grass family which we call grains, is the result of accident, not the result of science."
• "In addition, extra atoms are often present in grains causing planes of distortion called dislocations."