defecate

To excrete feces from one's bowels.

To pass (something) as excrement; to purge.

To clean (something) of dregs, impurities, etc.; to purify.

[I]f vve defæcate the notion from materiality, […] it vvill be as hard to apprehend, as that an empty vviſh ſhould remove Mountains: a ſuppoſition vvhich if realized, vvould relieve Siſyphus.

[…] I ſhall add, that proſecuting a hint a happened to meet with in the diſcourſe of a wandering chymiſt, I practiſed a way ſo to defecate the dark and muddy oil of amber drawn per ſe, that a pretty proportion of it would come over ſo tranſparent and finely coloured, that the experiment did not a little pleaſe thoſe I ſhewed it to.

Freed from pollutants, dregs, lees, etc.; refined; purified.

Till the soul be defecate from the dregs of sense.