1. The study of seals, especially those attached to documents
   - sigillography

Encyclopedia: Sphragistics

• ioniser
• ionization
• ionization chamber
• ionization tube
• ionize
• ionized
• ionizer
• ionizing radiation
• ionophoresis
• ionosphere
• ionospheric
• ionospheric wave
• iontophoresis
• iontotherapy
• IOP
• Iosif Vissarionovich Dzhugashvili
• iota
• IOU
• Iowa
• Iowa crab
• Iowa crab apple
• Iowan
• Ioway
• IP
• IP address