defecation [ˌdefə'keɪʃən]

例句:

• The drug's side-effects can include involuntary defecation.
  该药的副作用可能包括排便失禁。
  
• Defecation ( or Bowel movement ): Elimination of feces from the digestive tract.
  排 粪: 将粪便排出消化道的动作.
  
• Sweet potatoes fibre soft Yi Xiaohua, can promote gastrointestinal motility, help defecation.
  地瓜纤维质松软易消化, 可促进肠胃蠕动, 有助排便.
  
• Sometimes no latrines and there is open defecation in some of these areas.
  来自VOA
• The article states that "While women and girls would prefer indoor toilets, 'others' prefer open defecation".
  来自SA
• Often made of nylon, pantyhose can easily cut off a dog's urination and defecation pathways.
  来自SA