hydra
noun
Often Hydra a water or marsh serpent with nine heads, each of which, if cut off, grew back as two; Hercules killed this serpent by cauterizing the necks as he cut off the heads.
Hydrae
-
genitive of
hydra.
hydrae
-
pluralof hydra.plural
The grammatical form denoting more than one person, place, thing, or idea.
hydranounOften Hydra a water or marsh serpent with nine heads, each of which, if cut off, grew back as two; Hercules killed this serpent by cauterizing the necks as he cut off the heads.
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.
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
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
EX Hydrae exists in a binary system alongside a normal main sequence star.
From Science Daily ● Jan. 8, 2026
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
You saw that big Beta Hydrae orrery at Kankad's observatory.
From Uller Uprising by John D. Clark
