tertian

• صفة طبية قديمة تصف الحمى أو الأعراض التي تتكرر كل يوم ثالث، أي تحدث يوماً وتغيب يومين ثم تعود. وتُستعمل في السياق الطبي التاريخي للدلالة على الدورية والانتظام الزمني.

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.

   ثلاثي الأيام

   • 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.

   ثُلاثِيّ النَّغَم

   • 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.