The term 'MOVEMENT Muscle' is a combination of two crossword solutions: TIC (3 letters) and MOVEMENT. TIC stands for Transient Ischemic Contractions, which are short-term contractions of the muscles caused by a temporary lack of blood supply to the muscle. MOVEMENT is a general term that refers to the act of changing position or location. Together, MOVEMENT Muscle refers to the ability of muscles to move and contract in response to stimuli.