powellite /powˈə-lit or -līt/

A mineral, calcium molybdate

• screw plate
• screw plates
• screw press
• screw presses
• screw propeller
• screw-propeller
• screw propellers
• screws
• screw steamer
• screw steamers
• screw tap
• screw taps
• screw them
• screw thread
• screw threads
• screwtop
• screw-topped
• screwtops
• screw up
• screw-up
• screw-worm
• screw-worm fly
• screw-worms
• screw-wrench
• screw-wrenches