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==Etymology==
==Etymology==
[https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] consentrik, from Medieval Latin concentricus, from [[Latin]] com- + centrum [[center]]
[https://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English] consentrik, from Medieval Latin concentricus, from [[Latin]] com- + centrum [[center]]
*Date: [http://www.wikipedia.org/wiki/14th_Century 14th century]
*Date: [https://www.wikipedia.org/wiki/14th_Century 14th century]
==Definitions==
==Definitions==
*1 : having a common [[center]] <concentric circles>
*1 : having a common [[center]] <concentric circles>
'''Concentric''' objects [[share]] the same [[center]], [[axis]] or [[origin]] with one inside the other. [[Circles]], tubes, cylindrical shafts, disks, and [[spheres]] may be concentric to one another. Concentric objects do not [[necessarily]] have the same [[radius]].
'''Concentric''' objects [[share]] the same [[center]], [[axis]] or [[origin]] with one inside the other. [[Circles]], tubes, cylindrical shafts, disks, and [[spheres]] may be concentric to one another. Concentric objects do not [[necessarily]] have the same [[radius]].
==Examples of concentric phenomena==
==Examples of concentric phenomena==
Concentric cable is a cable type used in [http://en.wikipedia.org/wiki/TN-C-S TN-C-S] [http://en.wikipedia.org/wiki/Ground_(power)#earthing_systems earthing systems] where the combined neutral and [[earth]] core completely surrounds the live core(s). This minimizes the risk of completely cutting through the combined neutral and [[earth]] without first completely cutting through the live cores.
Concentric cable is a cable type used in [https://en.wikipedia.org/wiki/TN-C-S TN-C-S] [https://en.wikipedia.org/wiki/Ground_(power)#earthing_systems earthing systems] where the combined neutral and [[earth]] core completely surrounds the live core(s). This minimizes the risk of completely cutting through the combined neutral and [[earth]] without first completely cutting through the live cores.
[http://en.wikipedia.org/wiki/Muscle_contraction#Concentric_contraction Concentric muscles contractions] are those in which the muscle shortens.
[https://en.wikipedia.org/wiki/Muscle_contraction#Concentric_contraction Concentric muscles contractions] are those in which the muscle shortens.
[[Category: General Reference]]
[[Category: General Reference]]
