scatology

nouns

a preoccupation with obscenity (especially that dealing with excrement or excretory functions)
is derived from
is a type of (narrower)
an offensive or indecent word or phrase
(medicine) the chemical analysis of excrement (for medical diagnosis or for paleontological purposes)
domain category
the branches of medical science that deal with nonsurgical techniques
is a type of (narrower)
the act of decomposing a substance into its constituent elements