blancher

noun

1. One who, or that which, blanches or whitens; especially, one who anneals and cleanses money, or a chemical preparation for this purpose.

2. A machine for blanching or whitening.

3. (obsolete) One who, or that which, frightens away or turns aside.

- And Gynecia, a blancher, which kept the dearest deer from her. — Sir P. Sidney.And so even now hath he divers blanchers belonging to the market, to let and stop the light of the gospel. — Latimer.