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Grass, any plant of the family Gramineae. This group of mostly annual and perennial herbs has great economic importance: as a food source (cereal grass: wheat, rice, corn, rye, barley, and oats; hay and pasture plants, e.g., bluegrass and sorghum; sugarcane); in construction and thatching (bamboo and reed species); as raw material for paper and liquors. Grass-family plants, with their hollow or pithy jointed stems, are also instrumental in preventing erosion.

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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Grand Rapids to Hadron