regular muscle-prism noun1 •A simplified, geometric block representing a bundle of parallel muscle fibers; an old teaching model used for explaining tension, cross-sections, and electrical properties of muscle.... and a muscle of regular shape, in which the fibers are parallel, is selected. The ends are cut off by clean vertical cuts, and the resulting piece of muscle is called a regular muscle prism. — 1892 formsregular muscle prisms · regular muscle-prisms
