outscouring

From out- +‎ scouring.

outscouring (plural outscourings)

1. That which is scoured out or washed out.
   • 1823, William Buckland, Reliquiae Diluvianae:

     the outscourings of these valleys form the gravel in which such bones are for the most part embedded

• “outscouring”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.

• outsourcing