tertian

• 形容发热或症状每三天发作一次的；在医学语境中指间日疟等每隔一天复发的周期性发热。

An obsolete adjective describing a fever or symptom that recurs every third day, historically used in medical contexts.

1. Relating to recurring symptomsC2formalmedical

   Describing symptoms, especially malarial fever, that occur every other day.

   间日的

   • The patient presented with a tertian fever pattern.
   • Tertian malaria is characterized by paroxysms every 48 hours.
   • The doctor noted the tertian nature of the chills and fever.

2. Relating to a tonal systemC2formal

   Of or relating to a musical system based on major thirds.

   三度的

   • The composer explored tertian harmonies in his latest work.
   • Tertian chords are built by stacking major thirds.
   • This piece uses a tertian tonal system, creating a unique sound.