What is "exercise bone"

Exercise \Ex"er*cise\, n. [F. exercice, L. exercitium, from exercere, exercitum, to drive on, keep, busy, prob. orig., to thrust or drive out of the inclosure; ex out + arcere to shut up, inclose. See Ark.]

1. The act of exercising; a setting in action or practicing; employment in the proper mode of activity; exertion; application; use; habitual activity; occupation, in general; practice.

   exercise of the important function confided by the constitution to the legislature.
   --Jefferson.

   O we will walk this world, Yoked in all exercise of noble end.
   --Tennyson.

2. Exertion for the sake of training or improvement whether physical, intellectual, or moral; practice to acquire skill, knowledge, virtue, perfectness, grace, etc. ``Desire of knightly exercise.''
   --Spenser.

   An exercise of the eyes and memory.
   --Locke.

3. Bodily exertion for the sake of keeping the organs and functions in a healthy state; hygienic activity; as, to take exercise on horseback; to exercise on a treadmill or in a gym.

   The wise for cure on exercise depend.
   --Dryden.

4. The performance of an office, a ceremony, or a religious duty.

   Lewis refused even those of the church of England . . . the public exercise of their religion.
   --Addison.

   To draw him from his holy exercise.
   --Shak.

5. That which is done for the sake of exercising, practicing, training, or promoting skill, health, mental, improvement, moral discipline, etc.; that which is assigned or prescribed for such ends; hence, a disquisition; a lesson; a task; as, military or naval exercises; musical exercises; an exercise in composition; arithmetic exercises.

   The clumsy exercises of the European tourney.
   --Prescott.

   He seems to have taken a degree, and performed public exercises in Cambridge, in 1565.
   --Brydges.

6. That which gives practice; a trial; a test.

   Patience is more oft the exercise Of saints, the trial of their fortitude.
   --Milton.

   Exercise bone (Med.), a deposit of bony matter in the soft tissues, produced by pressure or exertion.

n. (context medicine English) A deposit of bony matter in the soft tissues, produced by pressure or exertion.