Tertian refers to something that can be divided by three.
"Tertian" Examples
Synonyms
Three-day Third
Used in Context
The symptoms worsened and followed a tertian pattern, occurring every third day. The tertian rhythm is characteristic of tertian malaria. The new employee reported for work every third day of each week. She sang a tertian harmony with the alto. The tertian scolions are rushed through in the back rooms behind the altar.