millstone : Idioms & Phrases
burr millstone
Burr" mill"stone`
Definitions
See Buhrstone .
Webster 1913
Lava millstone
- a hard and coarse basaltic millstone from the neighborhood of the Rhine.
Webster 1913
Millstone girt
(Geol.) , a hard and coarse, gritty sandstone, dividing the Carboniferous from the Subcarboniferous strata. SeeFarewell rock , underFarewell , a., and Chart ofGeology .
Webster 1913
To see into, ∨ through, a millstone
- to see into or through a difficult matter. (Colloq.)