4 words in this vocabulary list
noun a muscle that acts in opposition to another
noun the action or motion of moving back and forth or up and down rapidly
verb present participle form of the verb 'shake', indicating ongoing action of moving back and forth or up and down rapidly
noun a unit of work or energy equal to the work done by a force of one dyne when its point of application moves one centimeter in the direction of action of the force
adjective relating to or having acromyody, which is the absence of muscles in the distal parts of the limbs