Grist is grain

GRAIN

GRAIN is a small international non-profit organisation that works to support small farmers and social movements in their struggles for community-controlled and biodiversity-based food systems. Our support takes the form of independent research and analysis, networking at local, regional and...

 that has been separated from its chaff

Chaff

Chaff is the dry, scaly protective casings of the seeds of cereal grain, or similar fine, dry, scaly plant material such as scaly parts of flowers, or finely chopped straw...

 in preparation for grind

Grind

The grind of a blade refers to the shape of the cross-section of the blade. It is distinct from the type of blade , though different tools and blades may have lent their name to a particular grind.Grinding involves removing significant portions of metal from the blade and is thus distinct from...

ing. It can also mean grain that has been ground at a grist mill. Its etymology

Etymology

Etymology is the study of the history of words, their origins, and how their form and meaning have changed over time.For languages with a long written history, etymologists make use of texts in these languages and texts about the languages to gather knowledge about how words were used during...

 derives from the verb grind.

Grist can be ground into meal or flour

Flour

Flour is a powder which is made by grinding cereal grains, other seeds or roots . It is the main ingredient of bread, which is a staple food for many cultures, making the availability of adequate supplies of flour a major economic and political issue at various times throughout history...

, depending on how coarsely it is ground. Maize

Maize

Maize known in many English-speaking countries as corn or mielie/mealie, is a grain domesticated by indigenous peoples in Mesoamerica in prehistoric times. The leafy stalk produces ears which contain seeds called kernels. Though technically a grain, maize kernels are used in cooking as a vegetable...

 made into grist is called grits

Grits

Grits are a food of American Indian origin common in the Southern United States and mainly eaten at breakfast. They consist of coarsely ground corn, or sometimes alkali-treated corn . They are also sometimes called sofkee or sofkey from the Muskogee language word...

 when it is coarse, and corn meal when it is finely ground. Wheat

Wheat

Wheat is a cereal grain, originally from the Levant region of the Near East, but now cultivated worldwide. In 2007 world production of wheat was 607 million tons, making it the third most-produced cereal after maize and rice...

, oats

OATS

OATS - Open Source Assistive Technology Software - is a source code repository or "forge" for assistive technology software. It was launched in 2006 with the goal to provide a one-stop “shop” for end users, clinicians and open-source developers to promote and develop open source assistive...

, barley

Barley

Barley is a major cereal grain, a member of the grass family. It serves as a major animal fodder, as a base malt for beer and certain distilled beverages, and as a component of various health foods...

, and buckwheat

Buckwheat

Buckwheat refers to a variety of plants in the dicot family Polygonaceae: the Eurasian genus Fagopyrum, the North American genus Eriogonum, and the Northern Hemisphere genus Fallopia. Either of the latter two may be referred to as "wild buckwheat"...

 are also ground and sifted into flour and farina

Farina (food)

Farina is a cereal food, frequently described as mild-tasting, usually served warm, made from cereal grains. In contemporary American English use, the word usually refers to Cream of Wheat made from soft wheat. Wheat farina is a carbohydrate-rich food, often cooked in boiling water and served warm...

. Grist is also used in brewing

Brewing

Brewing is the production of beer through steeping a starch source in water and then fermenting with yeast. Brewing has taken place since around the 6th millennium BCE, and archeological evidence suggests that this technique was used in ancient Egypt...

 and distillation

Distillation

Distillation is a method of separating mixtures based on differences in volatilities of components in a boiling liquid mixture. Distillation is a unit operation, or a physical separation process, and not a chemical reaction....

 to make a mash

Mashing

In brewing and distilling, mashing is the process of combining a mix of milled grain , known as the "grain bill", and water, known as "liquor", and heating this mixture...

.

"Grist for the mill"

The proverb

Proverb

A proverb is a simple and concrete saying popularly known and repeated, which expresses a truth, based on common sense or the practical experience of humanity. They are often metaphorical. A proverb that describes a basic rule of conduct may also be known as a maxim...

 "all is grist for the mill" means "everything can be made useful, or be a source of profit." There are some minor variations, such as "all's grist that comes to his mill", meaning that the person in question can make something positive out of anything that comes along.

A miller

Miller

A miller usually refers to a person who operates a mill, a machine to grind a cereal crop to make flour. Milling is among the oldest of human occupations. "Miller", "Milne" and other variants are common surnames, as are their equivalents in other languages around the world...

 ground whatever grain was brought to him, and charged a portion of the final product for the service. Therefore, all grain arriving at the mill represented income, regardless of its quality. The first recorded usage was in the sixteenth century, but the term is probably much older. The term "gristmill

Gristmill

The terms gristmill or grist mill can refer either to a building in which grain is ground into flour, or to the grinding mechanism itself.- Early history :...

" was once common in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 and Britain

Kingdom of Great Britain

The former Kingdom of Great Britain, sometimes described as the 'United Kingdom of Great Britain', That the Two Kingdoms of Scotland and England, shall upon the 1st May next ensuing the date hereof, and forever after, be United into One Kingdom by the Name of GREAT BRITAIN. was a sovereign...

to describe a small mill open to all comers.