関: centric、centrosomal、centrosome

WordNet

small region of cytoplasm adjacent to the nucleus; contains the centrioles and serves to organize the microtubules (同)central_body
having or situated at or near a center (同)centrical
invest with or as with a body; give body to (同)personify
the external structure of a vehicle; "the body of the car was badly rusted"
the main mass of a thing
a natural object consisting of a dead animal or person; "they found the body in the lake" (同)dead body
the entire structure of an organism (an animal, plant, or human being); "he felt as if his whole body were on fire" (同)organic structure, physical structure
a collection of particulars considered as a system; "a body of law"; "a body of doctrine"; "a body of precedents"
a group of persons associated by some common tie or occupation and regarded as an entity; "the whole body filed out of the auditorium"; "the student body"; "administrative body"
an individual 3-dimensional object that has mass and that is distinguishable from other objects; "heavenly body"
the central message of a communication; "the body of the message was short"
in or near a center or constituting a center; the inner area; "a central position"
a workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communication (同)telephone exchange, exchange

PrepTutorEJDIC

〈C〉『身体』,肉体 / 〈C〉(人・動物の)『胴体』 / 〈C〉)物の)『主要部』,本体《+『of』+『名』》 / 〈C〉(…の)『団体』,群れ:(…のたくさんの)集まり《+『of』+『名』》 / 〈C〉物体,…体 / 〈U〉実質;(酒・味などの)こく / 〈C〉《話》人
『中心の』,中央の,中心からの / 『主要な』,中心的な(main) / (音声が)中舌音の / 電話交換局(《英》[telephone]exchange)
《英話》人;(特に)男

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2014/08/28 22:02:52」(JST)

wiki en

A primary (or gravitational primary, primary body or central body) is the main physical body of a gravitationally bound, multi-object system. This body contributes most of the mass of that system and will generally be located near its center of mass.

In the solar system, the Sun is the primary for all objects that orbit around it. In the same way, the primary of all satellites (be they natural satellites (moons) or artificial satellites) is the planet they orbit. The word primary is often used to avoid specifying whether the object near the center of mass is a planet, a star or any other astronomical object. In this sense, primary is always used as a noun.

Motion of the barycenter of solar system relative to the Sun.

The center of mass is the average position of all the objects weighed by mass. The Sun is so massive that the solar system's center of mass is very close to the center of the Sun. However, the gas giants are far enough from the sun that the center of mass of the solar system can be outside the Sun,^[1] despite the Sun having most of the mass of the solar system.

An interesting example of what can be called a primary is Pluto and its moon, Charon. The center of mass (or barycenter) of those two bodies is always outside Pluto's surface. This has led some astronomers to call the Pluto-Charon system a binary dwarf planet or a double planet rather than simply a dwarf planet (the primary) and its moon. In 2006, the International Astronomical Union briefly considered a formal definition of the term double planet that could have formally included Pluto and Charon but this definition was not ratified.

Beyond the solar system, the use of the noun primary, in reference to an exoplanet, is dubious. Astronomers have not yet detected any bodies that orbit an exoplanet. The use of primary to refer to the supermassive black holes in the center of most galaxies has not occurred in scientific journals.

Notes

^ What's a Barycenter?

UpToDate Contents

全文を閲覧するには購読必要です。 To read the full text you will need to subscribe.

1. 肥満、体重減少、および心血管疾患 obesity weight reduction and cardiovascular disease
2. 肥満の病因 pathogenesis of obesity
3. 成人の肥満のスクリーニングおよび臨床評価 screening for and clinical evaluation of obesity in adults
4. メタボリックシンドローム（インスリン抵抗性症候群またはシンドロームX） the metabolic syndrome insulin resistance syndrome or syndrome x
5. 成人の身体組成測定 determining body composition in adults

English Journal

Morphological and morphometric differentiation of dorsal-spined first stage larvae of lungworms (Nematoda: Protostrongylidae) infecting muskoxen (Ovibos moschatus) in the central Canadian Arctic.

Kafle P1, Lejeune M2, Verocai GG1, Hoberg EP3, Kutz SJ4.
International journal for parasitology. Parasites and wildlife.Int J Parasitol Parasites Wildl.2015 Jun 10;4(3):283-90. doi: 10.1016/j.ijppaw.2015.05.003. eCollection 2015.
Umingmakstrongylus pallikuukensis and Varestrongylus eleguneniensis are the two most common protostrongylid nematodes infecting muskoxen in the North American Arctic and Subarctic. First stage larvae (L1) of these lungworms have considerable morphological similarity that makes their differential dia
PMID 26155463

Conditions for Multi-functionality in a Rhythm Generating Network Inspired by Turtle Scratching.

Snyder AC1, Rubin JE.
Journal of mathematical neuroscience.J Math Neurosci.2015 Dec;5(1):26. doi: 10.1186/s13408-015-0026-5. Epub 2015 Jul 17.
Rhythmic behaviors such as breathing, walking, and scratching are vital to many species. Such behaviors can emerge from groups of neurons, called central pattern generators, in the absence of rhythmic inputs. In vertebrates, the identification of the cells that constitute the central pattern generat
PMID 26185063

Optimization of ZnO-NPs to Investigate Their Safe Application by Assessing Their Effect on Soil Nematode Caenorhabditis elegans.

Gupta S1, Kushwah T, Vishwakarma A, Yadav S.
Nanoscale research letters.Nanoscale Res Lett.2015 Dec;10(1):1010. doi: 10.1186/s11671-015-1010-4. Epub 2015 Jul 28.
Zinc oxide nanoparticles (ZnO-NPs) are increasingly receiving attention due to their widespread application in cosmetics, pigments and coatings. This has raised concerns in the public and scientific communities regarding their unexpected health effects. Toxicity effect of ZnO-NPs on the environment
PMID 26216012

Japanese Journal

THE DEMOGRAPHIC CHARACTERISTICS AND NUTRITIONAL STATUS FOR A HUNTER-GATHERER SOCIETY WITH SOCIAL TRANSITIONS IN SOUTHEASTERN CAMEROON

Izumi HAGINO Hiroaki SATO Taro YAMAUCHI
African study monographs. Supplementary issue 47, 45-57, 2014-03-20
… Pygmy hunter-gatherers in central African rainforest had lived in nomadic life, however, their surrounding environment have been changing. … Children's Z-scores indicated that although their body sizes were smaller than reference population, they had much amount of body weight and muscle for their height. …
NAID 110009687652

NUTRITIONAL STATUS AND PHYSICAL FITNESS OF PYGMY HUNTER-GATHERERS LIVING IN THE AFRICAN RAINFORESTS

Taro YAMAUCHI Hiroaki SATO Kyohei KAWAMURA
African study monographs. Supplementary issue 47, 25-34, 2014-03-20
… Pygmy hunter-gatherers living in the tropical rainforests of central Africa have attracted the attention of anthropologists for many decades because they are extremely short in stature. … In more than 85% of the participants, the body mass index (BMI; … In addition, skinfold thickness and body fat were negatively associated with physical fitness. …
NAID 110009687650

Nutritional Status and Physical Fitness of Pygmy Hunter-Gatherers living in the African Rainforests

YAMAUCHI Taro,SATO Hiroaki,KAWAMURA Kyohei
African study monographs. Supplementary issue. 47, 25-34, 2014-03
… Pygmy hunter-gatherers living in the tropical rainforests of central Africa have attracted the attention of anthropologists for many decades because they are extremely short in stature. … In more than 85% of the participants, the body mass index (BMI; … In addition, skinfold thickness and body fat were negatively associated with physical fitness. …
NAID 120005399074