Muscle is a contractile tissue.
The muscular tissue consists primarily of processes from the bases of the epithelial cells, processes which are contractile in nature and may be distinctly striated.
Kn, Contractile sinus.
The head bears a single pair of contractile but not invaginable tentacles, at the base of which are the eyes.
3, b, d) the cingulum is a mere - contractile hood.
That substance, in small doses, favours the contractile power of muscle.