Meaning of Cuisenaire rod

Cui•se•naire' rod"

Pronunciation: (kwē"zu-nâr', kwē'zu-nâr"), [key]
— Trademark. Trademark.
  1. one of a set of 10 colored rods from 1 to 10 cm (0.4 to 4 in.) in length, used in a method of teaching the basics of arithmetic to children.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.