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.

Horizontal Definition. The ease with which the sky can be distinguished from the land. Similar to contrast, cloud cover can give a poor horizon. Ice shelf Where ice is flowing off the main Antarctic plateau and is floating on the sea while still joined to the plateau. Halley Research Station is built on the Brunt Ice Shelf. Jolly A pleasure trip, can be used derisively "jolly merchant" for someone who always manages to get to go on the interesting trips. Summer only personnel may sometimes be referred to by winterers as "on a summer jolly"

The great circle on the celestial sphere marked by a plane perpendicular to the zenith-nadir axis and tangent to the Earth at the point of the observer.

The actual lower boundary of the observed sky or the upper outline of terrestrial objects, including nearby natural obstructions. It is the distant line along which the earth, or the water surface at sea, and the sky appear to meet.

The plane tangent to the Earth's surface at an observer's position. See celestial sphere for a helpful diagram.

a plane perpendicular to the line from an observer to the zenith. The great circle formed by the intersection of the celestial sphere with a plane perpendicular to the line from an observer to the zenith is called the astronomical horizon.

The visible juncture of Earth and the sky, represented in a horoscope by the Ascendant-Descendant axis.

On the astrolabe, the horizon is represented by the dark line labeled with the directions north, east and west.

(1) The line or circle which forms the apparent boundary between Earth and sky. (2) (Geological) A plane in rock strata characterized by particular features, as occurrence of distinctive fossil species. One of the series of distinctive layers found in a vertical cross-section of any well-developed SOIL.

An imaginary circle, halfway between the zenith and the nadir, which divides the sky into equal halves -- an upper half, which is mostly above the observer's skyline, and a lower half, which is mostly below the observer's skyline.

The line where the earth and sky, or ocean and sky, appear to meet.

the line at which the sky and Earth appear to meet

the great circle on the celestial sphere whose plane passes through the sensible horizon and the center of the Earth

an imaginary line that keeps moving further away as we get closer

the point at which an object entering a black hole cannot return; also the edge of a black hole the apparent junction of earth and sky.

The place where the sky meets the ground.

The line at a distance where the sky meets the land without respect to obstructions either man-made or natural. The point where sunrise and sunset are usually determined with three miles being the minimum distance required to determine a horizon.

The plane at right angles to the zenith-nadir axis that theoretically intersects the center of the earth, that plane subtending a great circle on the celestial sphere.

imaginary boundary between the sky and the ground

At sea level, the horizon is 90° away from the zenith in all directions.

The line marking the apparent junction of Earth and sky.

The earliest Time Step for which a full History is retained. It is expressed as a non-negative integer. A Transitioned Variable maintains pointers to the Mode Transition Variable at both the Horizon and the Zenith.

The horizontal plane passing through an observer and experienced as the circle where the sky meets the ground. Geometrically, it's the "tangent plane" to the Earth's surface at the position where the observer is located. One of the fundamental planes defining local space, along with the meridian and the Prime Vertical. See also House.

the distant line along with the earth and sky appear to meet, where nearby obstructions are not considered as part of the horizon

Where the Earth and sky appear to meet forming a line.

Where the water and sky or ground and sky appear to intersect.

A great circle on the celestial sphere 90° from the zenith; more popularly, the circle around us where the dome of the sky meets the Earth.

The horizon is an imaginary circle that delimits the sky and the Earth, or an extension of the plane of the observer (at an altitude of 0 degrees).

One of several lines or planes used as reference for observation and measurement relative to a given location on the surface of the earth. The geographic horizon, also called the apparent horizon, is the distant line along which earth and sky appear to meet. This is the usual concept of horizon and is used in weather observing. The local horizon is the actual lower boundary of the observed sky or the upper outline of terrestrial objects including nearby natural obstructions, such as mountains.

layers of soil, with properties distinct from those above and/or below

One of a particular layer of soil (e.g., the organic-rich "a" horizon) as used in soil science.

A layer of soil that is roughly parallel to the earth's surface and has distinct characteristics formed by the soil formation process.

a layer within the regolith approximately parallel to the land surface and differing from adjacent, genetically related, layers in physical, chemical and/or biological properties, or in characteristics such as colour, pH, structure, fabric, texture, consistency and types and numbers of organisms.

(1) a discrete regional cultural period or level of cultural development marked by some easily recognizable criterion or trait. (2) in soil-science terminology, a natural developmental zone in a soil profile such as the "A-horizon".

(3) See also soil horizon.

A layer in the soil with distinctive textural, mineralogical, chemical, or structural characteristics.

A specific sedimentary layer in a cross section of land, especially one in which a petroleum reservoir is found.

Layers in a soil formed by surface processes, by convention A and B horizons are equivalent to topsoil and subsoil.

Layers typical of the soil profile in a particular region.

A distinct layer of soil encountered in vertical section.

a layer of soil that runs parallel to the surface. Different levels have different degrees of organic matter, the richest being the top layer, or topsoil.

a specific layer or stratum of soil or subsoil in a vertical cross section of land

A given soil layer in a soil profile. Horizons are designated as A, B, C, or D, with the A horizon being the surface layer, usually.

A term used to describe a layer of archaeological material that is in situ.

layer of soil in the profile.

Distinct layer or group of layers of rock.

A layer within the soil profile with morphological characteristics and properties different from layers below and/or above it.

A soil layer approximately parallel to the earth's surface with definite physical and chemical characterisitcs

A vertical cut through a soil is called a soil profile. The soil profile is divided into horizontal layers called horizons. The A horizon is the uppermost one and is largely influenced by plant roots, microbial activity, earthworms, etc. The C horizon is the deepest and consists of relatively unweathered material. The B horizon occurs between the A and C horizons. Generally, the B horizon best expresses the weathering processes taking place in the soil. Not all soils have A, B, and C horizons. Some soils may not have a B horizon, for instance, while other soils may have other horizons that we did not have mentioned here.

a layer of soil with similar physical and chemical properties

See Soil Horizon Hormonal Growth Promotants (HGPs) A group of veterinary drugs that mimic the hormones that influence animal growth. They aim to improve the rate of food conversion of animals particularly cattle. They may be natural or synthetic and are normally implanted by means of a pellet under the skin of the ear. Further information.

a layer of soil or soil material approximately parallel to the land surface and differing from adjacent genetically related layers in physical, chemical, and biological properties or characteristics, such as color, structure, texture, consistency, amount of organic matter, and degree of acidity or alkalinity.

(1) Geology: An interface indicative of a particular position in a stratigraphic sequence, usually a distinctive and very thin bed.(2) Seismic: An interface associated with a seismic reflection that can be traced over a broad area.(3) Soil: A layer of soil distinguishable from over and underlying layers of physical or chemical properties and structures.(4) Surveying: One of several lines or planes used as references for observation and measurement relative to a given location on the earth's su

a term used in seismic interpretation to identify the signal reflected from a particular layer of rock.

The software used by SELCO Online Libraries, which includes automated library functions such as circulation, requests, cataloging, serials, notices, and reports.

HORIZON is the name of the company which created Niagara University's Library Catalog and circulation system. You will sometimes hear the Library staff refer to the computer system simply as HORIZON.