1. Hardy deciduous vine having large leaves and flowers with the calyx tube curved like the bowl of a pipe
   - Dutchman's-pipe, pipe vine, Aristolochia durior

Type of: Aristolochia clematitis, birthwort

• theory of inheritance
• theory of organic evolution
• theory of preformation
• theory of probability
• theory of punctuated equilibrium
• theory of relativity
• theory-based
• theosophical
• theosophism
• theosophist
• theosophy
• theoterrorism
• therapeutic
• therapeutic abortion
• therapeutic cloning
• therapeutic rehabilitation
• therapeutical
• therapeutically
• therapeutics
• Theraphosidae
• therapist
• therapsid
• Therapsida
• therapy
• Theravada