definition of aphelion
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aphelion aphelion - apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun. apoapsis, point of apoapsis - (astronomy) the point in an orbit farthest from the body being orbited.
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Aphorism Definition of Aphorism. An aphorism is a short saying that expresses a truth in a memorable way. Aphorisms can sometimes be humorous, but are not necessarily so. They often have some parallelism or juxtaposition to make the point, such as in the example of Lord Acton’s famous quote “Power tends to corrupt, and absolute power corrupts absolutely.”. Hippocrates, the ancient Greek physician, coined the term aphorism. He wrote a book called Aphorisms, which was full of short statements expressing medical truths. The definition of aphorism expanded to include truths about other sciences, and then to every type of philosophical principle.
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apathy Lack of interest or concern, especially regarding matters of general importance or appeal; indifference. 2. Lack of emotion or feeling; impassiveness. [Latin apathīa, from Greek apatheia, from apathēs, without feeling : a-, without; see a-1 + pathos, feeling; see kwent(h)- in the Appendix of Indo-European roots.]
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apostasy The definition of an apostasy is the act of leaving behind, or straying from, your religious or political beliefs or your principles. An example of apostasy is when someone decides to become atheist. pl. -·sies. an abandoning of what one has believed in, as a faith, cause, or principles. Origin of apostasy.
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Earth at Perihelion and Aphelion: 2001 to 2100 Introduction. Earth revolves around the Sun in an elliptical orbit with a mean eccentricity of 0.0167. As a result, Earth’s distance from the Sun (center-to-center) varies with mean values of 0.9832899 AU (147,098,074 km) at perihelion (closest) to 1.0167103 AU (152,097,701 km) at aphelion (most distant).xtreme Perihelion and Aphelion. The extremes in Earth's perihelion and aphelion distances for the 21 st Century are listed below. Earth’s mean distance from the Sun at perihelion is 0.9832899 AU (147,098,074 km). Earth’s mean distance from the Sun at aphelion is 1.0167103 AU (152,097,701 km).
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What is aphelion and perihelion? Aphelion is the point in a planet's orbit when it is furthest from the Sun; perihelion is the point at which it's closest. These terms can also be used for any other objects t … hat orbit the Sun such as asteroids and comets.phelion is the point in a planet's orbit when it is furthest from the Sun; perihelion is the point at which it's closest. These terms can also be used for any other objects t … hat orbit the Sun such as asteroids and comets.
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Aphasia Definitions Aphasia is an impairment of language, affecting the production or comprehension of speech and the ability to read or write. Aphasia is always due to injury to the brain-most commonly from a stroke, particularly in older individuals. But brain injuries resulting in aphasia may also arise from head trauma, from brain tumors, or from infections.
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- Apoptosis: A form of cell death in which a programmed sequence of events leads to the elimination of cells without releasing harmful substances into the surrounding area.
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Proscription Proscription (Latin: proscriptio) is, in current usage, a decree of condemnation to death or banishment (OED) and can be used in a political context to refer to state-approved murder or banishment.
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Apophenia Apophenia (/ æ p oʊ ˈ f iː n i ə /) is the tendency to attribute meaning to perceived connections or patterns between seemingly unrelated things. Confirmation bias is a variation of apophenia. The term (German: Apophänie) was coined by psychiatrist Klaus Conrad in his 1958 publication on the beginning stages of schizophrenia.
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apoptosis Apoptosis is morphologically characterised by chromatin condensation and DNA degradation, and is a mechanism used by the immune system for antigen-induced clonal deletion of cortical thymocytes (i.e., immune tolerance).
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- Definition of APHASIA. : loss or impairment of the power to use or comprehend words usually resulting from brain damage. — apha·sic \-zik\ noun or adjective.
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How did Oklahoma become part of the US? The area came under US control after the Civil War and consisted of three parts: the east and southeast were the Indian Territory (1834), the central section the Oklahoma Territory (1890), and the thin strip north of Texas (the panhandle), which was No Man's Land following the Compromise of 1850 and Kansas Statehood.
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Aphasia Aphasia is an inability to comprehend and formulate language because of damage to specific brain regions. This damage is typically caused by a cerebral vascular accident (stroke), or head trauma, however these are not the only possible causes.
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- Aport is defined as movement on, or in the direction of, the left side of a ship. An example of aport is when the captain of the boat asks you to move to the left side of the ship. aport
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- WordReference Random House Unabridged Dictionary of American English © 2016. ex•clu•sion (ik sklo̅o̅′zhən), n. 1  an act or instance of excluding. 2  the state of being excluded. [ Physiol.]a keeping apart; blocking of an entrance.
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- Definition of ATHELING. : an Anglo-Saxon prince or nobleman; especially: the heir apparent or a prince of the royal family. ADVERTISEMENT.
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Aphelion (disambiguation) Computer sciences. Aphelion (or Aphelion Imaging Software Suite), a software suite for image processing and analysis with a first release in 1996. Aphelion, a spacecraft in the saga of video games Ratchet and Clank which was in the 2007 and 2009 opuses.
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- Full Definition of EXTINCTION. 1. : the act of making extinct or causing to be extinguished. 2. 3. : the process of eliminating or reducing a conditioned response by not reinforcing it.
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Apostasy Logo of The Campaign for Collective Apostasy in Spain, calling for defection from the Catholic Church. Apostasy (/əˈpɒstəsi/; Greek: ἀποστασία (apostasia), a defection or revolt) is the formal disaffiliation from, or abandonment or renunciation of a religion by a person. It can also be defined within the broader context of embracing an opinion contrary to one's previous beliefs.
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Definition of 'apathy' Definition of 'apathy'. apathy (æpəθi ) You can use apathy to talk about someone's state of mind if you are criticizing them because they do not seem to be interested in or enthusiastic about anything. They told me about isolation and public apathy. ...the political apathy and emotional uncertainty of young Americans.
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Apathy Definition. Apathy can be defined as an absence or suppression of emotion, feeling, concern or passion. Further, apathy is an indifference to things generally found to be exciting or moving.
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- Definition of apopemptic. archaic. : sung or addressed to one departing : valedictory apopemptic hymns.
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Perihelion and aphelion The perihelion and aphelion are the nearest and farthest points (apsides) of a body's direct orbit around the Sun. The perihelion is the point in the orbit of a celestial body where it is nearest to its orbital focus, generally a star. It is the opposite of aphelion, which is the point in the orbit where the celestial body is farthest from its focus.
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Apoptosis Apoptosis (from Ancient Greek ἀπόπτωσις falling off) is a process of programmed cell death that occurs in multicellular organisms. Biochemical events lead to characteristic cell changes (morphology) and death.
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Aplasia Aplasia (from Greek a (not, no); plasis (molding)) is defined in general as defective development or congenital absence of an organ or tissue. In the field of hematology, the term refers to incomplete, retarded, or defective development, or cessation of the usual regenerative process. Examples. Acquired pure red cell aplasia