1. On or outside the dura mater
   - epidural

See also: dura mater

• sidereal hour
• sidereal month
• sidereal time
• sidereal year
• siderite
• Sideritis
• sideroblast
• sideroblastic anaemia
• sideroblastic anemia
• siderochrestic anaemia
• siderochrestic anemia
• siderocyte
• siderolite
• sideropenia
• siderophilin
• siderosis
• siderostat
• sidesaddle
• sideshow
• sideslip
• sidesman
• sidesplitter
• sidesplitting
• sidesplittingly
• sidestep