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Grain

The word grain has a great many meanings, most being descriptive of a small piece or particle. For examples:
  • a grain of sand or salt; see grain size for granule
  • a grain is a type of simple dry fruit technically called a caryopsis. In agriculture, such crops are often called cereals
  • in materials science (especially metallurgy), a grain is a single crystal inside solid-state matter, also referred to as crystallite
  • a very small unit of mass called a grain
  • the fineness of resolution for photographic film (i.e., graininess of a picture)
  • wood-grain, and as a description of personality or style from wood-working (i.e. going against the grain)
  • also granule, from the diminutive of Latin granum, meaning "grain".
  • Granules are short-lived concection cell structures on the visible surface of the Sun.
  • There is also an Isle of Grain in Kent, England, on which lies the village of Grain.

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