shrinker

Short definition from Wiktionary

Noun

1. 1
   Something that makes something else shrink.
2. 2
   A psychiatrist; a head-shrinker.
3. 3
   A sock-like article used to compress a stump remaining after amputation.
4. 4
   One who shrinks or recoils.
5. 5
   Something that itself shrinks.