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.
v. wagged, wagÂ·ging, wags. v. intr. 1. To move briskly and repeatedly from side to side, to and fro, or up and down: The dog's tail wagged. 2. To move rapidly in talking. Used of the tongue.3.Archaic To be on one's way; depart.. tr. To move (a body part) rapidly from side to side or up and down, as in playfulness, agreement, or admonition: wagged his finger at the giggling students. n. The act or motion of wagging: a farewell wag of the hand.