The difference between Crystal and Grain
When used as nouns, crystal means a solid composed of an array of atoms or molecules possessing long-range order and arranged in a pattern which is periodic in three dimensions, whereas grain means the harvested seeds of various grass food crops eg: wheat, corn, barley.
Crystal is also adjective with the meaning: very clear.
Grain is also verb with the meaning: to feed grain to.
check bellow for the other definitions of Crystal and Grain
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Crystal as a noun (countable):
A solid composed of an array of atoms or molecules possessing long-range order and arranged in a pattern which is periodic in three dimensions.
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Crystal as a noun (countable):
A piece of glimmering, shining mineral resembling ice or glass.
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Crystal as a noun (uncountable):
A fine type of glassware, or the material used to make it.
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Crystal as a noun (uncountable, slang):
Crystal meth: methamphetamine hydrochloride.
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Crystal as a noun:
The glass over the dial of a watch case.
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Crystal as an adjective:
Very clear.
Examples:
"Do I make myself clear?" / "Crystal."
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Grain as a noun (uncountable):
The harvested seeds of various grass food crops eg: wheat, corn, barley.
Examples:
"We stored a thousand tons of grain for the winter."
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Grain as a noun (uncountable):
Similar seeds from any food crop, eg buckwheat, amaranth, quinoa.
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Grain as a noun (countable):
A single seed of grass food crops.
Examples:
"a grain of wheat"
"'grains of [[oat]]"
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Grain as a noun (countable, uncountable):
The crops from which grain is harvested.
Examples:
"The fields were planted with grain."
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Grain as a noun (uncountable):
A linear texture of a material or surface.
Examples:
"Cut along the grain of the wood."
"He doesn't like to shave against the grain."
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Grain as a noun (countable):
A single particle of a substance.
Examples:
"a grain of sand"
"a grain of salt"
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Grain as a noun (countable):
A very small unit of weight, in England equal to 1/480 of an ounce troy, 0.0648 grams or, to be more exact, 64.79891 milligrams (0.002285714 avoirdupois ounce). A carat grain or pearl grain is 1/4 carat or 50 milligrams. The old French grain was 1/9216 livre or 53.11 milligrams, and in the mesures usuelles permitted from 1812 to 1839, with the livre redefined as 500 grams, it was 54.25 milligrams.
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Grain as a noun (countable):
A former unit of gold purity, also known as carat grain, equal to "carat" (karat).
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Grain as a noun (materials):
A region within a material having a single crystal structure or direction.
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Grain as a noun:
A reddish dye made from the coccus insect, or kermes; hence, a red color of any tint or hue, as crimson, scarlet, etc.; sometimes used by the poets as equivalent to Tyrian purple.
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Grain as a noun:
The hair side of a piece of leather, or the marking on that side.
Examples:
"rfquotek Knight"
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Grain as a noun (in the plural):
The remains of grain, etc., after brewing or distillation; hence, any residuum. Also called draff.
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Grain as a noun (botany):
A rounded prominence on the back of a sepal, as in the common dock.
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Grain as a noun:
Temper; natural disposition; inclination.
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Grain as a noun (photography, videography):
Visual texture in processed photographic film due to the presence of small particles of a metallic silver, or dye clouds, developed from silver halide that have received enough photons.
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Grain as a verb:
To feed grain to.
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Grain as a verb (transitive):
To make granular; to form into grains.
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Grain as a verb (intransitive):
To form grains, or to assume a granular form, as the result of crystallization; to granulate.
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Grain as a verb:
To texture a surface in imitation of the grain of a substance such as wood.
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Grain as a verb (tanning):
To remove the hair or fat from a skin.
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Grain as a verb (tanning):
To soften leather.
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Grain as a verb:
To yield fruit.
Examples:
"rfquotek Gower"
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Grain as a noun:
A branch of a tree; a stalk or stem of a plant.
Examples:
"rfquotek G. Douglas"
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Grain as a noun:
A tine, prong, or fork. One of the branches of a valley or river. An iron fish spear or harpoon, with a number of points half-barbed inwardly. A blade of a sword, knife, etc.
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Grain as a noun (founding):
A thin piece of metal, used in a mould to steady a core.