hemp

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hemp,

common name for a tall annual herb (Cannabis sativa) of the family Cannabinaceae, native to Asia but now widespread because of its formerly large-scale cultivation for the bast fiber (also called hemp) and for the drugs it yields. Known and cultivated in ancient China, the plant was introduced into Europe before the Christian era. In the United States it was cultivated for fiber chiefly in the Midwest, but competition from synthetic materials led to reduced crops, and antidrug legislation led to a federal ban (1970) on hemp growing without a permit. Federal legislation in 2014 eased restrictions on the growing of industrial hemp (which has very little drug content) for research purposes, and additional legislation in 2018 permitted the regulated commercial growing of industrial hemp. The fiber, retted from the stem, was one of the most important for various kinds of cordage; it was also used in making paper, cloth (canvas and other kinds), oakum for calking ships, and other products. The male and female flowers are borne on separate plants. The chemical derived from the female flowering tops in strains bred for their drug content is used medicinally; the tops are also the source of marijuanamarijuana
or marihuana,
drug obtained from the flowering tops, stems, and leaves of the hemp plant, Cannabis sativa (see hemp) or C. indica; the latter species can withstand colder climates.
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 and hashishhashish
, resin extracted from the flower clusters and top leaves of the hemp plant, Cannabis sativa, and C. indica. Hashish, called charas in India, is the most potent grade of cannabis and is obtained from cultivated plants grown in hot, moist climates.
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. Hemp seed is used as bird food, and the oil from the seeds is used in the manufacture of paints, varnishes, and soap and in cooking. The dried leaves are used in Asia for a beverage. The word hemp is used in combination for several other kinds of fiber plants, notably Manila hempManila hemp,
the most important of the cordage fibers. It is obtained chiefly from the Manila hemp plant (Musa textilis) of the family Musaceae (banana family). It is grown mainly in its native Philippine Islands, where it has been cultivated since the 16th cent.
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 and sisal hempsisal hemp
[from Sisal, former chief port of Yucatan], important cordage fiber obtained from the leaves of the sisal hemp plant, an extensively cultivated tropical agave (family Agavaceae or Liliaceae).
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. The true hemp plant is related to the hophop,
herbaceous perennial vine of the family Moraceae (mulberry family), widely cultivated since early times for brewing purposes. The commercial hop (Humulus lupulus
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, which is used in making beer. Hemp is classified in the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
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, class Magnoliopsida, order Urticales, family Cannabinaceae.

Hemp

One of the oldest cultivated crops, its use dates back to the stone age. Hemp is one of the most environmentally friendly fibers in the world and requires no pesticides, herbicides, or fertilizers, and it uses very little water. Hemp exhibits eight times the strength of cotton and can be woven into a variety of textures. Although currently illegal to cultivate in the United States, hemp is a fast-growing, environmentally sound substitute for cotton and wood fibers that requires little or no chemicals to produce paper, textiles, and a variety of other products.

Hemp

 

the coarse bast fiber from the stem of hemp plants (Cannabis sativa). The bast fibers from other plant species are also called hemp, for example, Manila hemp. Industrial hemp consists of elementary fibers measuring 14–15 mm long that are glued together. Fibers more than 700 mm long are obtained by breaking and scutching the washed and dried stems of C. sativa. Short fibers measuring 175–250 mm long are obtained from cleaning the by-products of scutching; they are also obtained from the short, matted, entangled, low-quality straw. Hemp is used to manufacture rope, string, twine, fishnets, canvas, sailcloth, and materials for furniture upholstery and drapery.

hemp

1. an annual strong-smelling Asian plant, Cannabis sativa, having tough fibres, deeply lobed leaves, and small greenish flowers: family Cannabidaeceae
2. the fibre of this plant, used to make canvas, rope, etc.
3. any of several narcotic drugs obtained from some varieties of this plant, esp from Indian hemp
References in periodicals archive ?
The municipality explained that hemp seed oil does not contain narcotic properties, and its oil is extracted in the same manner used in olives and coconuts.
Today, most hemp seeds are consumed by birds as commercial birdseed exported from China and sold in local pet stores.
Automated system of seedling image analysis (SVIS) and electrical conductivity to assess sun hemp seed vigor.
Hemp seeds and fibers can produce thousands of products.
During the hemp seed oil phase, participants experienced a statistically significant decrease in skin dryness of 29.4% and skin itchiness of 39%, whereas no significant changes were seen during the olive oil phase.
Asda today confirmed its seed mix contains 15% hemp seeds from the cannabis sativa plant, part of the cannabis family, but stressed it is different to hemp or cannabis associated with recreational drug use.
To maximize nutritional benefit, Blum recommends hemp seeds, due to the high fiber content.
They offer such products as shelled hemp seeds, organic hemp seed oil, nut butter, shakes, hemp milk, baked goods, and frozen waffles.
Now the snack, which is made from hemp seed and other natural ingredients is to be stocked by Tesco in 350 stores from July 19.
Shelled hemp seed contains 33 percent pure digestible protein and is rich in iron and vitamin E as well as an ideal balance of Omega-3 and Omega-6 fatty acids.
"Removing the cloud the DEA put into the marketplace will spur a dramatic surge in the supply and consumption of healthy omega-3-rich hemp seed in America," says David Bronner, chair of the food and oil committee for the Hemp Industries Association.
While birds have evolved with hemp seed in their diets, human infants have only been exposed placentally and via breast-feeding to PBDEs and PCBs for the last forty years, but at an exponentially growing rate for the former.