Medical Dictionary
grain
noun \ˈgrān\
Medical Definition of GRAIN
1
a : a seed or fruit of a cereal grass b : the seeds or fruits of various food plants including the cereal grasses and in commercial and statutory usage other plants (as the soybean) c : plants producing grain
2
: a small hard particle or crystal (as of sand or salt)
3
: a unit of avoirdupois, Troy, and apothecaries' weight equal to 0.0648 gram or 0.002286 avoirdupois ounce or 0.002083 Troy ounce—abbreviation gr
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