What is a Hydra?

[Tiomera]

I was reading through stuff online and I came throught the words worm and hydra. Does anyone know what are they, or where can I find more about that? Thanks

[Orkun]

Hydra : Is more Advanced Worm , Can take all informations in one time from all accounts

Worm : Making this job more slowly and older..

Hydra : More Dangerous worm type..

Worm : Nothing

:-))

Anyway Hydra has multi head :-))

[bskahan]

worm: squiggly sightless invertebret
hydra: mythical monster with multiple serpentine heads that grow back after being severed.