1. Being where earthquake waves arrive simultaneously
   - coseismic

See also: unstable

• Septuagesima
• Septuagesima Sunday
• Septuagint
• septum
• septuple
• septuplet
• sepulcher
• sepulchral
• sepulchrally
• sepulchre
• sepulture
• sequacious
• sequacity
• sequel
• sequela
• sequella
• sequenator
• sequence
• sequencer
• sequent
• sequential
• sequential file
• sequential operation
• sequentially
• sequester