Términos

Drupa oval o fruto con hueso del olivo. La aceituna comestible ha sido cultivada desde aproximadamente 3.500 a.C, generalmente en climas cálidos. Hay cientos de variedades identificadas.

La potencia a la cual la velocidad de un cuerpo cambia con la aplicación de tiempo.

Cualquier sustancia que apresura una reacción.

Estructura en la que las partículas atómicas o subatómicas se aceleran a altas energías por medio de campos eléctricos o magnéticos.

Estructura en la que los electrones, protones o hierro pesado son acelerados a lo largo de una lína recta por medio de la acción de voltaje alterna.

Instrumentos para medir, indicar o registrar fuerzas de aceleración, como aquellas transmitidas por gravedad o por artefactos aeronáuticos.

Instrumentos de crédito que especifican la intención del girador de pagar en la fecha de vencimiento. Generalmente se aplica a lgiros y letras de cambio.

Genus containing around 200 species of shrubs or trees widely distributed in the North Temperate Zone, but concentrated in China. Maples are used as ornamentals, tapped for syrup, and provide valuable, dense hardwood for furniture and other uses. All maples bear pairs of winged seeds, called samaras or keys. The leaves are arranged oppositely on twigs. Many maples have lobed leaves, but a few have leaves separated into leaflets. More recent classifications place the genus in the family Sapindaceae, although some have placed it in a family of its own, Aceraceae.

Species of small Eurasian maple tree native to Europe, the Balkans, and Turkey. It grows to 15-25 m in height, having low branches and five-lobed palmate leaves, used commonly in hedgerows.

Species of maple tree found in western North America, mostly near the Pacific coast. It has the largest leaves of any maple, with five deeply-incised palmate lobes.

Species of small, usually fast-growing and fairly short-lived maple tree native to the northeastern North America east of the Rocky Mountains, reaching 10-25 meters (33-82 feet) in height. Unlike most other maples, this species is fully dioecious, requiring both a male and female tree to reproduce.

Species of maple closely related to sugar maple (A. saccharum), and in some classifications treated as a subspecies; the situation is complicated by the fact that the two species tend to form hybrids. The two species may be distinguished by number of leaf lobes: the black maple has three-lobed leaves and the sugar maple has five-lobed leaves.

Species of deciduous shrub or small tree native to Japan, North Korea, South Korea, China, Mongolia, and southeast Russia; reaching 10 meters in height and typically an understory plant in shady woodlands. The tree may have multiple trunks joining close to the ground. Many different cultivars of this maple have been developed; even in the wild, seedlings from the same parent display remarkable variation in color and shape of leaves.

Species of large maple tree native to central Europe and western Asia, but introduced into Britain in the 15th century. On young trees, the bark is smooth and grey but becomes rougher with age and breaks up in scales, exposing the pale-brown-to-pinkish inner bark. It is an important timber and shade tree in Europe, having many ornamental varieties. For other trees sometimes called simply "sycamore," use "Ficus sycamorus" for the sycamore fig and "Platanus occidentalis" for the American sycamore.

Species of maple native to eastern North America, growing to 27 m (90 feet) in height and having leaves that turn bright red in autumn. It is known in many cultivars and often planted as an ornamental in cities, because it tolerates compact soil and urban pollution. The wood of the red maple is used in furniture, flooring, and veneer. The bark and leaves produce a dye that colors cotton and wool a cinnamon color with an alum mordant and a black color with an iron mordant. Syrup can be prepared from its sap. Seeds and shoots are food for squirrels, rabbits, and deer.

Species of rapid-growing shade tree, native to eastern North America and widely cultivated elsewhere. It grows to 18 m (60 feet) in height. Its wood is soft, but used for crating and inexpensive furniture. It can produce syrup, but is low yield. It drops branches and produces numerous shoots, making it problematic as an ornamental, although several useful varieties have been produced.

Species of maple tree native to the eastern half of North America, widely grown as an ornamental and shade tree. It is a commercially important source of maple syrup, maple sugar, and hardwood lumber. Some trees of this species tend to develop special grain patterns called "bird's-eye maple." The tree has a smooth trunk, five-lobed leaves, and winged seeds.

Se refiere a caminos peatonales a lo largo de caminos o calles.

Producción de una capa superficial dura en el acero, como por carbonización, cianidización o endurecimiento con llama.