A jack (mechanical lifting device) which is operated by turning a leadscrew.
A leadscrew; a screw used to translate rotational into linear motion.
jackscrews
jackscrews
noun
plural of jackscrew
jasperware
jasperware
noun
(ceramics) A form of pottery that has a stoneware body which is either white or colored, which is noted for its matte finish. It is a popular blue-and-white ware, but it comes in many other colors.