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grain medical definition
noun
- A small, dry, one-seeded fruit of a cereal grass, having the fruit and the seed walls united.
- The fruits of cereal grasses especially after having been harvested, considered as a group.
- A relatively small discrete particulate or crystalline mass.
- Abbr. gr. A unit of weight in the US Customary System, an avoirdupois unit equal to 0.002286 ounce (0.065 gram).
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