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Definition
Greek mythology: a monster with nine heads; when struck off each head was replaced by two new onesor more generally (as a common noun):
trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality
- The Hydra's heads would only stop multiplying if we burned the stumps before they regrew.Rick Riordan -- The Sea of Monsters
Hydra = Greek mythology: a monster with nine heads; when struck off each head was replaced by two new ones
- I ran my hand across a picture of Tyson, battling the Hydra as he held aloft a box of Monster Donuts.Rick Riordan -- The Sea of Monsters
- Now that we were in the Sea of Monsters, the water glittered a more brilliant green, like Hydra acid.Rick Riordan -- The Sea of Monsters
- I stuffed my few belongings that had survived the Hydra into a sailor's canvas knapsack and slung it over my shoulder.Rick Riordan -- The Sea of Monsters
- I didn't dare look away from the Hydra, but if that was who I thought it was behind us, I figured we now had enemies on two fronts.Rick Riordan -- The Sea of Monsters
- I ducked as the Hydra spat acid over my head.Rick Riordan -- The Sea of Monsters
- Annabeth shouted, keeping her eyes on the Hydra.Rick Riordan -- The Sea of Monsters
- Tyson charged in, putting himself between the Hydra and Annabeth.Rick Riordan -- The Sea of Monsters
- But even Tyson couldn't fend off the Hydra forever.Rick Riordan -- The Sea of Monsters
- Now I was looking at an eight-headed Hydra.Rick Riordan -- The Sea of Monsters
- I sliced the Hydra's head clean off.Rick Riordan -- The Sea of Monsters
- The Hydra was only a few feet away.Rick Riordan -- The Sea of Monsters
- The Hydra stumbled backward, yanking its heads free then wailing in outrage at the fallen tree.Rick Riordan -- The Sea of Monsters
- I'd seen a stuffed Hydra-head trophy at camp before, but that did nothing to prepare me for the real thing.Rick Riordan -- The Sea of Monsters
- As soon as my glowing blade appeared, the Hydra whipped toward it with all its heads, hissing and baring its teeth.Rick Riordan -- The Sea of Monsters
- I tackled him with all my might, knocking him aside just as the Hydra lunged and the tree crashed on top of two of its heads.Rick Riordan -- The Sea of Monsters
- One of the Hydra heads spat an arc of green liquid that shot past my shoulder and splashed against an elm.Rick Riordan -- The Sea of Monsters
- It was possible the Hydra might pass us by.Rick Riordan -- The Sea of Monsters
- The Hydra followed.Rick Riordan -- The Sea of Monsters
- There was a flash of light, a column of smoke, and the Hydra exploded right in front of us, showering us with nasty green slime that vaporized as soon as it hit, the way monster guts tend to do.Rick Riordan -- The Sea of Monsters
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