faecal       
adjective UK formal (US fecal) uk/ˈfiː.kəl/ us/ˈfiː.kəl/
 粪便的
consisting of, contained in, or relating to the solid waste passed out of the body of a human or animal through the bowels
  faecal matter 粪便物质 
 Faecal bacteria can be present in sea water. 海水中可能存在粪便中的细菌。 
 See: faeces
 - More examples
 - The meat was contaminated by microbes spread primarily by faecal material.
 - Cholera is transmitted through faecal pathogens.
 - The medication can cause a feeling of faecal urgency.