evacuator

Etymology

From evacuate + -or.

evacuator means One who evacuates; a nullifier. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

noun

One who evacuates; a nullifier.“In which words sure He doth not pitch on the name of scribes and Pharisees, peculiarly as those that were the greatest evacuators of the law by their own hypocritical practices or false glosses in some particulars […]”
An agent for emptying, especially an instrument for removing fragments of stone from the bladder after litholapaxy.