faeces /ˈfiːsiːz 
/ (US English feces) ▸ plural noun waste matter remaining after food has been digested, discharged from the bowels; excrement: if necessary, samples of blood or faeces will be taken
salmonella is found in the faeces of many animals.
– ORIGIN late Middle English: from Latin, plural of faex ‘dregs’.
EnglishOxford Dictionary of English
