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Terrestrial refers to things related to
land Land, also known as dry land, ground, or earth, is the solid terrestrial surface of the planet Earth that is not submerged by the ocean or other bodies of water. It makes up 29% of Earth's surface and includes the continents and various islan ...
or the planet
Earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surfa ...
. Terrestrial may also refer to: *
Terrestrial animal Terrestrial animals are animals that live predominantly or entirely on land (e.g. cats, dogs, ants, spiders), as compared with aquatic animals, which live predominantly or entirely in the water (e.g. fish, lobsters, octopuses), and amphibians, ...
, an animal that lives on land opposed to living in water, or sometimes an animal that lives on or near the ground, as opposed to arboreal life (in trees) ** A fishing fly that simulates the appearance of a land insect is referred to as a terrestrial fly. *
Terrestrial ecoregion An ecoregion (ecological region) or ecozone (ecological zone) is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than a biogeographic realm. Ecoregions cover relatively large areas of l ...
, land ecoregions, as distinct from freshwater ecoregions and marine ecoregions *
Terrestrial ecosystem Terrestrial ecosystems are ecosystems which are found on land. Examples include tundra, taiga, temperate deciduous forest, tropical rain forest, grassland, deserts. Terrestrial ecosystems differ from aquatic ecosystems by the predominant presence ...
, an ecosystem found only on landforms *
Terrestrial gamma-ray flash A terrestrial gamma-ray flash (TGF), also known as dark lightning, is a burst of gamma rays produced in Earth's atmosphere. TGFs have been recorded to last 0.2 to 3.5 milliseconds, and have energies of up to 20 million electronvolts. It is specu ...
, a burst of gamma rays produced in Earth's atmosphere *
Terrestrial locomotion Terrestrial locomotion has evolved as animals adapted from aquatic to terrestrial environments. Locomotion on land raises different problems than that in water, with reduced friction being replaced by the increased effects of gravity. As viewed ...
, evolutionary adaptation from aquatic types of locomotion *
Terrestrial plant A terrestrial plant is a plant that grows on, in, or from land. Other types of plants are aquatic (living in water), epiphytic (living on trees) and lithophytic (living in or on rocks). The distinction between aquatic and terrestrial plants is ...
, a plant that grows on land rather than in water or on rocks or trees *
Terrestrial planet A terrestrial planet, telluric planet, or rocky planet, is a planet that is composed primarily of silicate rocks or metals. Within the Solar System, the terrestrial planets accepted by the IAU are the inner planets closest to the Sun: Mercury, Ve ...
, a planet that is primarily composed of silicate rocks, and thus "Earth-like" *
Terrestrial radio Radio broadcasting is transmission of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radio sta ...
, radio signals received through a conventional aerial, as opposed to satellite radio *
Terrestrial radiation Background radiation is a measure of the level of ionizing radiation present in the environment at a particular location which is not due to deliberate introduction of radiation sources. Background radiation originates from a variety of sources ...
, due to the insolation of heat by the earth surface, earth re-radiates the heat to the atmosphere in the form of long waves *
Terrestrial reconnaissance {{unreferenced, date=December 2008 Terrestrial reconnaissance, or ''ground'' recon, is a type of reconnaissance that is employed along the elements of ground warfare. It is the collection of intelligence that strictly involves routes, areas, zones ...
, a type of reconnaissance that is employed along the elements of ground warfare *
Terrestrial reference frame A terrestrial reference frame (TRF) is the reference frame as one views from Earth, or from the surface of another Earth-like planet. A TRF affects the way humans perceive almost everything from day to day because as they live on the Earth, as a ...
, the reference frame as one views from earth *
Terrestrial television Terrestrial television or over-the-air television (OTA) is a type of television broadcasting in which the signal transmission occurs via radio waves from the terrestrial (Earth-based) transmitter of a TV station to a TV receiver having an ant ...
, television signals received through a conventional aerial, as opposed to satellite television or cable television *
Terrestrial Time Terrestrial Time (TT) is a modern astronomical time standard defined by the International Astronomical Union, primarily for time-measurements of astronomical observations made from the surface of Earth. For example, the Astronomical Almanac uses T ...
, an astronomical time standard *
Terrestrial Trunked Radio Terrestrial Trunked Radio (TETRA; formerly known as Trans-European Trunked Radio), a European standard for a trunked radio system, is a professional mobile radio and two-way transceiver specification. TETRA was specifically designed for use by go ...
, a specialist walkie talkie standard used by police departments, fire departments, ambulance services and the military *
Cretaceous Terrestrial Revolution The Cretaceous Terrestrial Revolution (abbreviated KTR), also known as the Angiosperm Terrestrial Revolution (ATR) by authors who consider it to have lasted into the Palaeogene, describes the intense diversification of angiosperms, insects, reptiles ...
, the intense diversification of land animals


See also

*
Extraterrestrial (disambiguation) Extraterrestrial refers to any object or being beyond ( extra-) the planet Earth (terrestrial). It is derived from the Latin words ''extra'' ("outside", "outwards") and ''terrestris'' ("earthly", "of or relating to the Earth"). It may be abbreviat ...
*
Terrestre (disambiguation) Terrestre may refer to: * Terrestre (band), a Mexican band * ''Terrestre (album)'', 2005 album by the Italian rock band Subsonica * ''terrestre'' or ''terrestris'', a Latin term meaning "terrestrial" used in systematic names for biological spe ...
*
Terrestris This list of Latin and Greek words commonly used in systematic names is intended to help those unfamiliar with classical languages to understand and remember the scientific names of organisms. The binomial nomenclature used for animals and plants i ...
* Degrees of glory#Terrestrial kingdom * * {{disambiguation