Relating to or having the nature of excrement; consisting of or containing waste matter from the body.
From Latin excrementum (that which is sifted out), from excernere (to sift out, discharge), combined with -itious suffix meaning 'of the nature of.' The term evolved to describe anything waste-like or disgusting.
This word perfectly shows how Latin scientific terminology tried to describe bodily functions with dignity—by using the term 'sifted out' instead of something cruder, similar to how we use euphemisms like 'bathroom' today.
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