Meaning : (Greek mythology) monster with nine heads. When struck off each head was replaced by two new ones.
							Example : 
							Hydra was slain by Hercules.
							
Meaning : A long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer.
Synonyms : snake
Meaning : Trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality.
							Example : 
							We may be facing a hydra that defies any easy solution.
							
Meaning : Small tubular solitary freshwater hydrozoan polyp.
Translation in other languages :