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one of a pair of heavy flat disc-shaped stones that are rotated one against the other to grind grain



a round, dressed natural or artificial stone; the working part of a set of millstones, which hulls glumaceous crops and mills grain and other materials. Millstones working in pairs were widespread in the third and fourth centuries B.C.; prior to that grain was ground in mortars. Millstones were originally turned by humans or animals, but when they became larger in size they came to be powered by water and wind.

Millstones are made of one or several pieces (natural) or small particles (artificial) of rock. Hard types of rock such as quartzite (the best), sandstone, and granite are used for natural millstones; artificial millstones are made of crushed flint, quartzite, and emery or a mixture of emery and flint, cemented together by magnesium chloride or caustic magne-site. On their working surfaces millstones have grooves, the edges of which are the cutting parts. Millstones with sharp edges split grain particles more rapidly.



References in periodicals archive ?
Prior to Millstone, Neuberger held various senior executive roles.
Invited guests will attend the launch event at The Millstone Hare on Friday, August 19.
Yet even such basic grindstones can effectively process seeds, which are a seasonal food staple in this area, though tjiwa are much less efficient than millstones for processing large volumes of grain.
In my opinion, the recent repeated failure of radiation monitoring equipment at Millstone Units 2 and 3 as necessitating the appointment of a radiation director who is unquestionably independent and free of industry influence.
Neil Sheehan, a spokesman for the Nuclear Regulatory Commission, said allowing Millstone to use warmer water drew no opposition from the public.
In total, there are around 1,800 breeding ewes at Millstone Moor, plus a 60-strong suckler cattle herd made up of pure Limousins and Belgian Blue crosses.
At Millstone, 19 canisters loaded with spent fuel are arrayed on a concrete pad, which was expanded in October to make room for as many as 135 canisters by 2045.
Named after Queens Plaza's historic Millstones, which date back to the 1650's, The Millstone is located at 41-18 27th Street.
According to Millstone, commercial conflicts of interest appear to exist for seven members who work or used to work for commercial organisations that have direct interests in aspartame.
THE Millstone lifted the Nick Porter Cup to complete a trophy double.
WITH the ever increasing difficulty to keep your head above water, it seems there's a surefire ministerial operation to load a millstone around your neck to end your dreams of keeping afloat.
Overlooking the obvious spelling error in its headline (millstone is laughably spelt with one "l"), Mr Musson believes this will be a "significant" millstone.