tertian

• relating to symptoms (especially malarial fever) that appear every other day
• of or relating to a tonal system based on major thirds
• Occurring every third day
• A disease, especially an intermittent fever, which returns every third day, reckoning inclusively, or in which the intermission lasts one day
• A liquid measure formerly used for wine, equal to seventy imperial, or eighty-four wine, gallons, being one third of a tun

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