hypermobility

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hy·per·mo·bil·i·ty

(hī'pĕr-mō-bil'i-tē),
Increased range of movement of joints, and joint laxity, occurring normally in children and adolescents or as a result of disease, for example, Marfan or Ehlers-Danlos syndrome.
Farlex Partner Medical Dictionary © Farlex 2012

hypermobility

Instability Orthopedics Any motion occurring in a joint in response to the reactive force of gravity at a time when that joint should be stable under such a load; hypermobility is often misused to describe extra movement as seen in a contortionist.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

Hypermobility

Unusual flexibility of the joints, allowing them to be bent or moved beyond their normal range of motion.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
To join the pipe, crews used the Serimer Automatic System where the double joints were automatically welded.
Even with her double joints, Casey says it's a tight situation.
Alex also began to take "double joints" -cannabis rolled with speed - leading to his near-fatal roof plunge.
Trial assemblies were PE lined as individual pipe strings, welded as double joints for full-scale reeling trials and subjected to pressure testing and leak detection of the PE annulus.