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walnut,

common name for some members of the Juglandaceae, a family of chiefly deciduous, resinous trees characterized by large and aromatic compound leaves. Species of the walnut family are indigenous mostly to the north temperate zone, but also range from Central America along the Andes to Argentina and through tropical Asia to Java and New Guinea.

Common Species and Their Uses

Several trees of the Juglandaceae are of commercial importance for the edible nuts and for lumber. The "nuts" (they are actually drupelike), usually enclosed in a leathery or woody hull, include many of the most valuable food nuts of the United States—the walnut and the butternut of the walnut genus Juglans and the pecan, hickory nut, pignut, and mockernut of the hickoryhickory,
any plant of the genus Carya of the family Juglandaceae (walnut family); deciduous nut-bearing trees native to E North America and south to Central America except for a few species found in SE Asia. The pecan (C.
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 genus Carya. The single-seeded nuts contain no endosperm; the edible portion is the corrugated, meaty seed leaves of the embryo itself. Lumber is obtained chiefly from Juglans, Carya, and Engelhardia. The latter genus is now restricted to East Asia, but fossil trees have been found in the United States. Species of these and other genera (e.g., Pterocarya, the Asian wingnuts) are often planted as ornamental shade trees.

The walnut genus Juglans (from Lat. Jovis glans=nut of Jove) is the largest and most widely distributed genus of the family. The dark timber of the black walnut (J. nigra), found in hardwood forests in the eastern half of North America, and of the Persian, or English, walnut (J. regia), native to W Asia, is unusually hard and durable and is valued for furniture, interior paneling, gunstocks, musical instruments, and other uses. Black walnut has been the foremost cabinet wood of North America since colonial times.

The closer-grained English walnut, usually sold as lumber under the name Circassian walnut, is widely cultivated in S Europe and the Orient and has been introduced with great success into California, now the major producing area of the world. The nut of this tree is more easily extracted from the shell than that of the black walnut and is the one usually sold commercially for use as a table nut and for confectionery, flavorings, and sometimes pickling. A decoction of the leaves, bark, and hulls has been used for a brown wool dye and the crushed leaves for an insect repellent.

The butternut, or white walnut (J. cinerea), of approximately the same range as the black walnut, has a sweet and oily nut that is gathered locally but is not of commercial importance. The butternut is also timbered; the wood is softer than that of the black and English walnuts. Sugar is sometimes obtained from its sap, and the hulls yield a yellow to gray dye that gave color to the homespun of pioneers and to the "butternut" uniforms of some Confederate soldiers. The inner root bark, called butternut bark, has been used in domestic remedies, as have the hulls of the English walnut. Other American and Old World walnuts are also used and esteemed locally for timber, dyes, and food.

Classification

The walnut family 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 Juglandales.

The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/

What does it mean when you dream about a walnut?

A walnut has a significant resemblance to the human brain. In a dream a walnut may indicate a great deal of mental activity is being expended or, alternatively, that someone in the dreamer’s environment is a “nut.” In some cultures, to dream of walnuts is an omen of excessive joys and favors.

The Dream Encyclopedia, Second Edition © 2009 Visible Ink Press®. All rights reserved.

walnut

[′wȯl·nət]
(botany)
The common name for about a dozen species of deciduous trees in the genus Juglans characterized by pinnately compound, aromatic leaves and chambered or laminate pith; the edible nut of the tree is distinguished by a deeply furrowed or sculptured shell.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

walnut

A tough, dark brown-to-black wood having high strength; does not split easily; has a fine-to-coarse open grain; takes a high polish.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

walnut

1. any juglandaceous deciduous tree of the genus Juglans, of America, SE Europe, and Asia, esp J. regia, which is native to W Asia but introduced elsewhere. They have aromatic leaves and flowers in catkins and are grown for their edible nuts and for their wood
2. the wood of any of these trees, used in making furniture, panelling, etc.
3. a light yellowish-brown colour
4. made from the wood of a walnut tree
5. of the colour walnut
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
HTF MI Analyst have added a new research study on Title Global and China Walnuts Ingredient Market Research by Company, Type & Application 2013-2025 with detailed information of Product Types [, Walnut Powder, Walnut Milk, Walnut Biscuits, Walnut Bread & Others], Applications [Supermarket, Convenience Store, Online Stores & Others] & Key Players Such as ADM, Olam International, Hammons, Carriere Family Farms, Callebaut, Kanegrade Limited, Kerry Group, Groupe Soparind Bongrain (Fruisec), The Hershey Company, Mars, Mondelez International & Russell Stover Candies etc.
Walnuts are also an excellent source of alpha-linolenic acid (ALA) which is the plant-based omega-3 fatty acid and contains 2.5 grams of ALA per 28g which is more than eight times the amount found in the next highest nut.
In a first-of-its-kind study, researchers at the University of Missouri, Columbia, have confirmed that black walnuts contain molecular compounds called phytosterols, which have been shown to help prevent obesity, diabetes, and cardiovascular disease while promoting lower cholesterol and inflammation as well as anticancer activity in the body.
Local man Azamat Tolukbayev, owner of walnut trees in the forest, said the walnuts is the main income for his family.
"The strong connection we see in this study between walnut consumers and lower prevalence of type 2 diabetes is additional justification for including walnuts in the diet.
From mid-September through October, Sundial processes up to 400 tons of walnuts a day.
A black walnut is one of the most picturesque and resilient of our native trees.
NESTLE is creating a brave new whirl for chocaholics by ditching the Walnut Whip's nut.
However, before walnuts reach your grocery store, they must be harvested, washed, dehulled (hulls removed from shells), and dried.
ISLAMABAD -- To boost up the gut health, start consuming half a cup of walnuts daily to protect the digestive system.
coffeae were recovered from the infested walnut branches that were released in the fresh billets of walnuts in artificial galleries.