a layer of delicate meristematic tissue between the inner bark or phloem and the wood or xylem, which produces new phloem on the outside and new xylem on the inside in stems, roots, etc., originating all secondary growth in plants and forming the annual rings of wood.
noun (pl) -biums, -bia (-bɪə)
(botany) a meristem that increases the girth of stems and roots by producing additional xylem and phloem See also cork cambium
Plural cambiums or cambia
A cylindrical layer of tissue in the stems and roots of many seed-bearing plants, consisting of cells that divide rapidly to form new layers of tissue. Cambium is a kind of meristem and is most active in woody plants, where it lies between the bark and wood of the stem. It is usually missing from monocotyledons, such as the grasses. ◇ The vascular cambium forms tissues that carry water and nutrients throughout the plant. On its outer surface, the vascular cambium forms new layers of phloem, and on its inner surface, new layers of xylem. The growth of these new tissues causes the diameter of the stem to increase. ◇ The cork cambium creates cells that eventually become bark on the outside and cells that add to the cortex on the inside. In woody plants, the cork cambium is part of the periderm. See also secondary growth.
a melodic ornamental tone following a principal tone by a skip, usually of a third above or below, and progressing by a step.
a dealer in bills of exchange. an expert in foreign exchange. a manual giving the moneys, weights, and measures of different countries, with their equivalents. Historical Examples Chambers’s Twentieth Century Dictionary (part 1 of 4: A-D) Various noun (finance) a dealer or expert in foreign exchange a manual of currency exchange rates and similar equivalents […]
a layer of delicate meristematic tissue between the inner bark or phloem and the wood or xylem, which produces new phloem on the outside and new xylem on the inside in stems, roots, etc., originating all secondary growth in plants and forming the annual rings of wood. Contemporary Examples What It Takes to Kill a […]
a republic in SE Asia: formerly part of French Indochina. 69,866 sq. mi. (180,953 sq. km). Capital: Phnom Penh. Contemporary Examples Cambodia’s New War Katrin Redfern April 15, 2009 Keeping Up With the Mubaraks Karen Leigh January 28, 2011 Julianne Moore’s Squashed Toes; Ceiling Collapses in Cambodia Shoe Factory The Fashion Beast Team May 15, […]