Dictionary > Horizon

Horizon

Horizon
1. The circle which bounds that part of the earth’s surface visible to a spectator from a given point; the apparent junction of the earth and sky. And when the morning sun shall raise his car Above the border of this horizon. (Shak) All the horizon round Invested with bright rays. (Milton)
2. (Science: astronomy) The unbroken line separating sky and water, as seen by an eye at a given elevation, no land being visible.
3. (Science: geology) The epoch or time during which a deposit was made. The strata all over the earth, which were formed at the same time, are said to belong to the same geological horizon. (le Conte)
4. The chief horizontal line in a picture of any sort, which determines in the picture the height of the eye of the spectator; in an extended landscape, the representation of the natural horizon corresponds with this line. Apparent Horizon. See apparent. Artificial horizon, a level mirror, as the surface of mercury in a shallow vessel, or a plane reflector adjusted to the true level artificially; used chiefly with the sextant for observing the double altitude of a celestial body. Celestial Horizon.
(Science: astronomy) see def. 2, above. Visible Horizon. See definitions 1 and 2, above.
Origin: f, fr. L. Horizon, fr. Gr. (sc) the bounding line, horizon, fr. To bound, fr. Boundary, limit.
The line at which the sky and earth appear to meet.A specific layer or stratum of soil or subsoil in a vertical cross section of land.The differentiation of soil layers looking on from a vertical angle, each one being a different horizon sorted in layers.


You will also like...

Cell structure
Cell Structure

A typical eukaryotic cell is comprised of cytoplasm with different organelles, such as nucleus, endoplasmic reticulum, G..

Electromagnetic spectrum of a brain
Sleep and Dreams – Neurology

While learning and intelligence are associated with the functions of a conscious mind, sleep and dreams are activities o..

sponge
Primitive Animals

Life, as we know it today, is presumed to have started in the sea and many of them were likely eukaryotic animal-like or..

Still freshwater and plants
Still Freshwater & Plants

Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..

DNA carries genes coding for proteins
Genetic Information and Protein Synthesis

Genes are expressed through the process of protein synthesis. This elaborate tutorial provides an in-depth review of the..

Crossing Over and Genetic Diversity
Inheritance and Probability

Gregor Mendel, an Austrian monk, is most famous in this field for his study of the phenotype of pea plants, including ..