tertium quid /tûrˈsh(i-)əm kwid or terˈti-ŭm/)

1. A third unknown thing related to two specific known things
2. Something intermediate between opposites
3. The third person in the eternal triangle

• epideictic
• epideictical
• epidemic
• epidemical
• epidemically
• epidemicities
• epidemicity
• epidemics
• epidemiological
• epidemiologies
• epidemiologist
• epidemiologists
• epidemiology
• epidendrone
• epidendrum
• epidendrums
• epidermal
• epidermic
• epidermis
• epidermises
• epidermoid
• epidermolysis bullosa
• Epidermophyton
• epidiascope
• epidiascopes