hydra
(noun)
noun
1. (Greek mythology) monster with nine heads; when struck off each head was replaced by two new ones
- Hydra was slain by Hercules
Definition categories: person
2. a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer
Similar word(s): snake
Definition categories: object
3. trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality
- we may be facing a hydra that defies any easy solution
Definition categories: thought, problem, trouble
4. small tubular solitary freshwater hydrozoan polyp