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systremma in Medicine

systremma

(sĭ-strĕmə)
n.
  1. A muscular cramp in the calf of the leg in which the contracted muscles form a hard ball.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.