反作用fǎnzuòyòng 1.承受作用力的物体对于施力的物体的作用。反作用力和作用力的大小相等,方向相反,并在同一条直线上。{reaction; reciprocal action of an object subjected to a force. Every action has an equal and opposite reaction in the same straight line.} 2.相反的作用{reaction effect; counterreaction; retroaction}: 填鸭式的教学方法只能起～。{A cramming (or force-feeding) method of teaching can only be counter-productive.}