grain

中文： 粮食、谷物、谷类、颗粒

1. The harvested seeds of various grass food crops, especially wheat, maize, rye, barley, and rice. (uncountable) · Near-synonym: corn (broad sense, maize and others)· We stored a thousand tons of grain for the winter.
2. Similar seeds from any food crop, e.g., buckwheat, amaranth, quinoa. (uncountable) · Near-synonym: corn (broad sense, maize and others)
3. A single seed of a food crop, especially a cereal grass crop. (countable) · a grain of wheat· grains of oat
4. The crops from which grain is harvested. (countable, uncountable) · The fields were planted with grain.
5. A linear texture of a material or surface. (uncountable) · Cut along the grain of the wood.· He doesn't like to shave against the grain.
6. A single particle of a substance. (countable) · a grain of sand· a grain of salt
7. The English grain of ¹⁄₅₇₆₀ troy pound or ¹⁄₇₀₀₀ pound avoirdupois, now exactly 64.79891 mg. (countable, uncountable)
8. The metric, carat, or pearl grain of ¹⁄₄ carat used for measuring precious stones and pearls, now exactly 50 mg. (countable, uncountable)

复数 grains