1. Used to denote the end of a proof of some proposition
   - QED

Encyclopedia: Quod erat demonstrandum

• subfamily Carduelinae
• subfamily Carpinaceae
• subfamily Cetoniidae
• subfamily Corylaceae
• subfamily Dorylinae
• subfamily Dracaenaceae
• subfamily Dracenaceae
• subfamily Emberizidae
• subfamily Emberizinae
• subfamily Garrulinae
• subfamily Gerbillinae
• subfamily Hydromyinae
• subfamily Loriinae
• subfamily Lutrinae
• subfamily Malaconotinae
• subfamily Melinae
• subfamily Melolonthidae
• subfamily Mephitinae
• subfamily Merginae
• subfamily Mimosoideae
• subfamily Nelumbonaceae
• subfamily Numididae
• subfamily Numidinae
• subfamily Papilionoideae
• subfamily Perdicidae