'Subtracter' definitions:

Definition of 'subtracter'

(from WordNet)
noun
A person who subtracts numbers
noun
A machine that subtracts numbers

Definition of 'Subtracter'

From: GCIDE
  • Subtracter \Sub*tract"er\, n.
  • 1. One who subtracts. [1913 Webster]
  • 2. The subtrahend. [Obs.] [1913 Webster]