Chinese Abacus. The abacus is first known in China from the Northern Song dynasty through the work of Shao Yong (1011-1077). Like many early inventions it is not clear precisely where it originally came from. Some say Central Asia; some Asia Minor and others China.
Snag(noun) a stump or base of a branch that has been lopped off; a short branch, or a sharp or rough branch; a knot; a protuberance. Snag(noun) a tooth projecting beyond the rest; contemptuously, a broken or decayed tooth.
a wire loop for removing polyps and other pedunculated growths by cutting them off at the base. snare. An instrument for removing polyps and other projections from a surface, especially within a cavity; it consists of a wire loop passed around the base of the tumor and gradually tightened. snare. (snÄr) a wire loop for removing polyps and tumors by encircling them at the base and closing the loop.