rock-forming
chiefly Geology
adjective
That forms rock; especially (of a mineral) that occurs as a major constituent of igneous rock.
Origin
Mid 19th century.
- quarter evil
- quarter face
- quarter fee
- quarter-final
- quarter-finalist
- quarter-gallery
- quarter-galley
- quarter girth
- quarter girth measure
- quarter grain
- quarter ground
- quarter guard
- quarter-gunner
- quarter heel
- quarter-hollow
- quarter hoop
- Quarter Horse
- quarter-hour
- quartering
- quartering machine
- quarter-in-the-slot
- quarter jack
- quarterland
- quarter leather
- quarter-light