pay gravel
noun
Gravel containing enough gold to yield a profit.
Origin
Mid 19th century.
- opencasting
- open cell
- open chain
- open check
- open cheque
- open-chested
- open-circuit
- open-circuited
- open city
- open classroom
- open cluster
- Open College
- open communion
- open community
- open company
- open compound
- open-concept
- open-countenanced
- open country
- open court
- open cover
- open credit
- open crown
- open cut
- open cycle