noun
: a small board with spaces for the insertion of blocks of different shapes and sizes that is used to test an individual's speed and accuracy of insertion and his approach to the problem
noun
: a small board with spaces for the insertion of blocks of different shapes and sizes that is used to test an individual's speed and accuracy of insertion and his approach to the problem
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012