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.
noun. verb. Lug is defined as a heavy bolt used to fasten a wheel, or is slang for a big man. 1  An example of a lug is the bolt used to mount a tire.2  A man who is helpful at lifting heavy things is an example of a lug.oun. 1  A handle or projection used as a hold or support. 2  A lug nut. 3  Nautical A lugsail. 4  A projecting part of a larger piece that helps to provide traction, as on a tire or the sole of a boot.