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(uncountable) The harvested seeds of various grass food crops eg: wheat, corn, barley.
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(uncountable) Similar seeds from any food crop, e.g., buckwheat, amaranth, quinoa.
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(countable) A single seed of grass food crops.
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(countable, uncountable) The crops from which grain is harvested.
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(uncountable) A linear texture of a material or surface.
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(countable) A single particle of a substance.
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(countable) Any of various small units of mass originally notionally based on grain's weight, variously standardized at different places and times, including
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(countable, chiefly historical) Any of various small units of length originally notionally based on a grain's width, variously standardized at different places and times.
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(countable, historical) The carat grain of ¹⁄₄ carat as a measure of gold purity, creating a 96-point scale between 0% and 100% purity.
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(materials) A region within a material having a single crystal structure or direction.
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(astronautics) The solid piece of fuel in an individual solid-fuel rocket engine.
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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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The hair side of a piece of leather, or the marking on that side.
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(in the plural) The remains of grain, etc., after brewing or distillation; hence, any residuum.
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(botany) A rounded prominence on the back of a sepal, as in the common dock.
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Temper; natural disposition; inclination.
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(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.