Found 2 items, similar to gristmill.
English → English (WordNet) Definition: gristmill gristmill n : a mill for grinding grain (especially the customer's own grain)
English → English (gcide) Definition: Gristmill Gristmill \Grist“mill”\, n. A mill for grinding grain; especially, a mill for grinding grists, or portions of grain brought by different customers; a custom mill. [1913 Webster]