rider stone
now historical
noun
1 Mining (the name of) a stratum of ironstone within the coal measures of Staffordshire, England.
2= rider millstone.
Origin
Mid 17th century; earliest use found in Dud Dudley (?1600–1684), ironmaster.
- Dalriatan
- Dalriatic
- dal segno
- dalton
- daltonism
- Dalton, John
- Dalton's law
- Daly City
- Dalí, Salvador
- dam
- dama gazelle
- damage
- program chair
- program chairman
- program company
- program contracting
- program contractor
- program counter
- program girl
- programist
- program junction
- program library
- program line
- programma
- programmability