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Definitions

hydra

[hahy-druh] / ˈhaɪ drə /


NOUN
dragon
Synonyms


NOUN
polyp
Synonyms




Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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"In 20 years, and despite the resolute efforts of our police officers, gendarmes, judges, teachers and elected officials, the antisemitic hydra has kept advancing," he said.

From Barron's ● Feb. 13, 2026

“It’s like a hydra, like a three-headed monster!” she says with a hearty laugh.

From Los Angeles Times ● Jan. 22, 2025

"We have to look at Wagner not only as a single man but as an ecosystem, as a hydra with many many heads and many diverse interests in Africa."

From BBC ● Aug. 24, 2023

This suggests that evolution plays around with these chemical pathways, altering them over the hundreds of millions of years since the hydra and human lineages diverged from each other on the evolutionary tree.

From Scientific American ● Jun. 16, 2023

It was almost a good thing that he’d lost his sword, since his gut instinct would’ve been to slash at the heads, and a hydra simply grew two new ones for each one it lost.

From "The Mark of Athena" by Rick Riordan

Melatonin also makes hydras snoozy, Itoh and his team found, and genes that control sleep in hydras are similar to those that do so in humans.

From Scientific American ● Jun. 16, 2023

"Online services are like hydras, if you fix one problem, another one often emerges," James Mickens, a professor of computer science at Harvard, explains in a statement.

From BBC ● Sep. 9, 2021

Everyone in New York has heard about co-op boards that proved to be the most persnickety of the many many-headed hydras exerting authority over daily life.

From New York Times ● May 8, 2016

The name van Leeuwenhoek gave them was “polyps,” though they would eventually be commonly known as hydras.

From Salon ● Jan. 17, 2016

One of the hydras had a tree sapling sprouting between its necks.

From "The Last Olympian" by Rick Riordan

The mission's ability to measure the polarization of X-rays allowed astronomers to closely examine EX Hydrae, a type of system known as an intermediate polar.

From Science Daily ● Jan. 8, 2026

In EX Hydrae, the magnetic field is not strong enough to direct all incoming material onto the star's magnetic poles.

From Science Daily ● Jan. 8, 2026

EX Hydrae exists in a binary system alongside a normal main sequence star.

From Science Daily ● Jan. 8, 2026

The infalling matter collides with other material bound to the white dwarf, forming tall columns of hot gas that emit intense X-rays, making systems like EX Hydrae ideal targets for IXPE.

From Science Daily ● Jan. 8, 2026

They have a model, a most ingenious affair run by clockwork, at the University of Konkrook, to show the apparent movement and position of Beta Hydrae in the sky; it does so fairly accurately.

From Uller Uprising by John D. Clark


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