plural of rock shaft

(engineering) A cam keyed to a rock shaft.

(US, simile) Very stupid; dumb as a post.

A method of improving the fertility of poor soils by adding a layer of small stones atop the soil, with perhaps some fertilizer atop the soil before adding rocks. The added rocks/stones would leech minerals from the rocky layer into the soil and have the stony layer retain moisture in the soil. The layer of stones remains in place when the area is cultivated.

(Northern England dialect) Alternative form of anyroad

Synonym of radius bar / Synonym of radius arm

A fish, the gurnard. / A bird, the red-breasted merganser.

plural of Robinson-Schensted correspondence

(mathematics) A bijective correspondence between permutations and pairs of standard Young tableaux of the same shape. It has applications in combinatorics and other areas.

(countable) A strip of metal cut to be made into nails. / (uncountable, obsolete) A form of strong tobacco.