Definify.com

Webster 1913 Edition

Noun.

One who evacuates; a nullifier.

“Evacuators of the law.”

Hammond.

Noun.

One that makes void.

evacuator ‎(plural evacuators)

One who evacuates; a nullifier.
- Henry Hammond
  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.

ēvacuātor