A number that when multiplied by itself some number of times equals a given number.
Of an equation, a value that satisfies the equality. For example, x = 0 and x = 5 are roots of the equation x2 -5x = 0.

In politics, anyone with opinions more extreme than the main current of a country's major political party or parties. It is more often applied to those with left-wing opinions, although the radical right also exists.1. A character conveying the lexical meaning of a logogram.
2. A person who has radical ideas or opinions.
3. A sign placed in front of an expression to denote that a root is to be extracted; SYN. radical sign.
In Britain, supporter of parliamentary reform before the Reform Bill 1832. As a group the Radicals later became the progressive wing of the Liberal Party. During the 1860s (led by Cobden, Bright, and J S Mill) they campaigned for extension of the franchise, free trade, and laissez faire, but after 1870, under the leadership of Joseph Chamberlain and Charles Dilke, they adopted a republican and semisocialist program. With the growth of socialism in the later 19th century, Radicalism ceased to exist as an organized movement.
In France, the Radical Party was a major force in the politics of the Third Republic, 1871–1940. + prikaži više

The usually underground portion of a plant that lacks buds or leaves or nodes; absorbs water and mineral salts; usually it anchors the plant to the ground.
The part of a plant that is usually underground, and whose primary functions are anchorage and the absorption of water and dissolved mineral salts. Roots usually grow downward and toward water (that is, they are positively geotropic and hydrotropic; see tropism). Plants such as epiphytic orchids, which grow above ground, produce aerial roots that absorb moisture from the atmosphere. Others, such as ivy, have climbing roots arising from the stems, which serve to attach the plant to trees and walls.
The absorptive area of roots is greatly increased by the numerous, slender root hairs formed near the tips. A calyptra, or root cap, protects the tip of the root from abrasion as it grows through the soil.
Symbiotic associations occur between the roots of certain plants, such as clover, and various bacteria that fix nitrogen from the air (see nitrogen fixation). Other modifications of roots include contractile roots, pneumatophores, taproots, and prop roots. + prikaži više