evacuator

transitive verb evacuated, evacuating

1. to make empty; remove the contents of; specif., to remove air from so as to make a vacuum
2. to discharge (bodily waste, esp. feces)
3. 1. to remove (inhabitants, etc.) from (a place or area), as for protective purposes
   2. to give up military occupation of; withdraw from

Origin: < L evacuatus, pp. of evacuare < e-, out + vacuare, to make empty < vacuus, empty

intransitive verb

1. to withdraw, as from a besieged town or area of danger
2. to discharge bodily waste, esp. feces