(dated, countable) Calculation; computation. / (countable, mathematics) Any formal system in which symbolic expressions are manipulated according to fixed rules.

(sometimes with the) Initialism of Xinjiang Autonomous Region, officially Xinjiang Uyghur Autonomous Region, an administrative region of China.

plural of todde

The activities and groups, clubs, and societies that are sponsored or regulated by an educational institution but which are not part of the academic curriculum.