QED

1. Quantum electrodynamics
2. Quod erat demonstrandum (Latin), which was to be demonstrated (or proved; also q.e.d.)

• phytophagic
• phytophagous
• phytoplankton
• phytoplanktons
• phytoremediation
• phytoses
• phytosis
• phytosterol
• phytosterols
• phytotomies
• phytotomist
• phytotomists
• phytotomy
• phytotoxic
• phytotoxicities
• phytotoxicity
• phytotoxin
• phytotoxins
• phytotron
• phytotrons
• pi
• PI
• pia
• PIA
• piacevole