underdrift

Having the gearing that turns the millstone beneath the floor.

The overdrift method in smock mills may be seen at Punnetts Town, and the underdrift at Shipley.

In an overdrift mill this gear is mounted on the quant, in an underdrift mill on the stone spindle.

An underlying meaning that is not made explicit.

Now, Lydia, looking two ways, seemed to see double, but even she did not discover the subtle underdrift which gave this poem a distinct meaning for two persons.

Paris then stands for art, for merriment, for laughter, music and song ; and, forgetting the pathetic underdrifts, we look with eager eyes on the bright examples which reach us from her salons and parlors, ...

Synonym of undertow.

This alone, except the underdrift from breakers, brings new materials to form an original deposit in the sea.

It was last decided to throw down breakwaters altogether, which lets the wind and the waves riot at their will, save only as dredges may plow furrows through the underdrift, to pass like children's markings on a beach.