millrun

[mil-ruhn]

noun

a test of the mineral content or quality of a rock or ore consisting of the actual milling of a sample.
the mineral obtained by means of this test.

Origin of millrun

First recorded in 1645–55; mill1 + run

mill-run

[mil-ruhn]

adjective

coming directly from a mill, especially without having been sorted: mill-run carpets.

Origin of mill-run

An Americanism dating back to 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for millrun

millrun

noun

another name for millrace
mining
  1. the process of milling an ore or rock in order to determine the content or quality of the mineral
  2. the mineral so examined

adjective mill-run

mainly US (of commodities) taken straight from the production line; unsorted as to quality
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012