fistula : Idioms & Phrases
cassia fistula
- 
       noun deciduous or semi-evergreen tree having scented sepia to yellow flowers in drooping racemes and pods whose pulp is used medicinally; tropical Asia and Central and South America and Australia
       
       
 drumstick tree; purging cassia; canafistula; canafistola; pudding pipe tree; golden shower tree.
 
WordNet
Incomplete fistula
- (Med.) , a fistula open at one end only.