shrinkage

Short definition from Wiktionary

Noun

1. 1
   The act of shrinking, or the proportion by which something shrinks.
2. 2
   The act of shrinking, or the proportion by which something shrinks: The loss of merchandise through theft, spoilage, and obsolescence: the shrinking of inventory.
3. 3
   The act of shrinking, or the proportion by which something shrinks: The reduction in size of the male genitalia when cold, such as from immersion in cold water.