detrusion

noun

1. (archaic, countable, uncountable)A downward out outward thrust.

   “the detrusion of the Church from her legitimate influence, which sufficiently accounts for that absence of feeling for the beautiful and holy, which has so obscured and vulgarized the mind of modern age”

   “detrusion of the anus”

   “In Fig. 236 c d must be to c b in the ratio that the force to resist detrusion bears in the direct cohesion of the material”