The Collaborative International Dictionary
Disdiaclast
Disdiaclast \Dis*di"a*clast\, n. [Gr. di`s- twice + diakla^n to break in twain; dia` through + kla^n to break.] (Physiol.) One of the dark particles forming the doubly refracting disks of muscle fibers.
Wiktionary
disdiaclast
n. (context physiology English) One of the dark particles forming the doubly refracting disks of muscle fibres.