1. Low-growing annual herb of southwestern United States (Texas) having silky foliage and blue flowers; a leading cause of livestock poisoning in the southwestern United States
   - buffalo clover, Texas bluebonnet, Lupinus subcarnosus 
2. A brimless dark blue Scottish cap with a flat top and a plume on one side
   - Balmoral

Derived forms: bluebonnets

Type of: cap, lupin, lupine

Encyclopedia: Bluebonnet

• sterilisation
• sterilise
• sterilised
• steriliser
• sterility
• sterilization
• sterilize
• sterilized
• sterilizer
• sterlet
• sterling
• sterling area
• sterling bloc
• sterling silver
• stern
• stern chaser
• Sterna
• Sterna hirundo
• sternal
• Sterne
• Sterninae
• sternite
• sternly
• sternmost
• sternness