The Chinese abacus is thought to have been created by a famous mathematician Cheng Dawei of the Ming Dynasty between 1368 and 1644. A typical elementary abacus has 10 parallel wires strung between two boards on a frame, with nine beads on each wire. Each bead has a value of 10, a multiple or sub multiple of 10.
The definition of a snigger is a contained or half held-in laugh. An example of a snigger is a quiet laugh behind a person's back. Snigger is defined as to snicker or hold back a laugh. An example of snigger is to secretly laugh at someone behind their back.
âI heard the class snigger as I buried my head under my arms.â âShe sniggered and the rest of them laughed along.â âShe sniggered softly, as if she'd never heard anything more ridiculous in her life.â âFelicity took one look at old Mrs. Briney and burst out laughing, sniggering and pointing at her.â