Rotation

Rotus stands for:

regular rhythm for a specific event, see periodicity
Turnus (mythology) , a king of Roman mythology
Turnus (satirist) , Roman satirist in the 1st century
in Austria the practical training period for general practitioners, see Rotusarzt #Der Rotus
Turnus Film , Swiss film production company
Regular exhibitions of the Swiss Art Association

See also:

Wiktionary: Turnus - explanations of meanings, word origins, synonyms, translations