Grain (noun)

1. A single seed of a cereal plant, such as wheat, corn, or rice.
2. The fruit of a cereal plant, such as wheat, corn, or rice.
3. The direction, texture, or pattern of fibers or fibers in a material or object.
4. A small, hard particle, such as salt or sugar.
5. A unit of weight, equal to 0.065 gram.

Origin:

Middle english: from old french grain, from latin granum "seed".

Examples:

1. The farmer grows different types of grain.
2. Rice is a staple food in many countries and is made from the grain of the rice plant.
3. The grain of the wood was beautifully smooth.
4. The grains of salt were larger than usual.
5. The weight of the gold was measured in grains.