1. A common iris of the eastern United States having blue or blue-violet flowers; root formerly used medicinally
   - Iris versicolor

Derived forms: blue flags

Type of: flag, fleur-de-lis, iris, sword lily

Encyclopedia: Blue flag

• crimson-magenta
• crimson-purple
• crimson-yellow
• cringe
• cringing
• cringle
• crinion
• crinite
• crinkle
• crinkled
• crinkleroot
• crinkly
• crinoid
• Crinoidea
• crinoline
• criollo
• cripes
• cripple
• crippled
• crippler
• crippling
• crisis
• crisis intervention
• crisp
• crispate