thick filament


my·o·sin fil·a·ment

one of the contractile elements in skeletal, cardiac, and smooth muscle fibers; in skeletal muscle, the filament is about 15 nm thick and 1.5 mcm long. Synonym(s): thick filament

thick filament

In a sarcomere, one of the collection of contractile filaments made primarily of myosin, seen microscopically.