Pronunciation: (mil'run'), [key]
coming directly from a mill, esp. without having been sorted: mill-run carpets.
Pronunciation: (mil'run"), [key]
2. a test of the mineral content or quality of a rock or ore consisting of the actual milling of a sample.
3. the mineral obtained by means of this test.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.