Webster's Revised Unabridged Dictionary · 1913

Grist

Grist , noun

[Anglo-Saxon grist, from grindan. See Grind.]

1.
Ground corn; that which is ground at one time; as much grain as is carried to the mill at one time, or the meal it produces.
Get grist to the mill to have plenty in store. — Tusser. Q
2.
Supply; provision. — Swift
3.
In rope making, a given size of rope, common grist being a rope three inches in circumference, with twenty yarns in each of the three strands. — Knight
Collocations (2)
All is grist that comes to his mill , all that he has anything to do with is a source of profit. [Colloquial]
To bring grist to the maill , to bring profitable business into one's hands; to be a source of profit. [Colloquial] — Ayliffe