We found 2 dictionaries that define the word Trachtenberg system:

General (2 matching dictionaries)

1. Trachtenberg system, Trachtenberg system: Wikipedia, the Free Encyclopedia

Definitions from Wikipedia (Trachtenberg system) ▸ noun:  a system of rapid mental calculation. ▸ Words similar to Trachtenberg system ▸ Usage examples for Trachtenberg system ▸ Idioms related to Trachtenberg system ▸ Wikipedia articles (New!) ▸ Words that often appear near Trachtenberg system ▸ Rhymes of Trachtenberg system ▸ Invented words related to Trachtenberg system