hydra

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Hy·dra

 (hī′drə)
n.
1. Greek Mythology The many-headed monster that was slain by Hercules.
2. Astronomy A satellite of Pluto.
3. A constellation in the equatorial region of the southern sky near Cancer, Libra, and Centaurus. Also called Snake2.
4. A persistent or multifaceted problem that cannot be eradicated by a single effort.

[Middle English Idra, from Latin Hydra, from Greek Hudrā, Hydra, a water serpent; see wed- in Indo-European roots.]

hy·dra

 (hī′drə)
n. pl. hy·dras or hy·drae (-drē)
Any of several small solitary freshwater hydrozoans of the genus Hydra and related genera, having a cylindrical body and a mouth surrounded by tentacles.

[New Latin Hydra, genus name, from Latin Hydra, Hydra; see Hydra.]

hydra

(ˈhaɪdrə)
n, pl -dras or -drae (-driː)
1. (Animals) any solitary freshwater hydroid coelenterate of the genus Hydra, in which the body is a slender polyp with tentacles around the mouth
2. a persistent trouble or evil: the hydra of the Irish problem.
[C16: from Latin, from Greek hudra water serpent; compare otter]

Hydra

(ˈhaɪdrə)
n
(Classical Myth & Legend) Greek myth a monster with nine heads, each of which, when struck off, was replaced by two new ones

Hydra

(ˈhaɪdrə)
n, Latin genitive Hydrae (ˈhaɪdriː)
(Astronomy) a very long faint constellation lying mainly in the S hemisphere and extending from near Virgo to Cancer

hy•dra

(ˈhaɪ drə)

n., pl. -dras, -drae (-dri) for 1–3, gen. -drae (-dri) for 4.
1. (often cap.) a water monster of Greek myth having nine heads, each of which, if cut off, grew back as two.
2. any freshwater polyp of the family Hydridae, having a cylindrical body with a ring of tentacles surrounding the mouth.
3. a persistent or complex problem that presents new obstacles even as existing ones are overcome.
4. (cap.) the Sea Serpent, a southern constellation extending through 90° of the sky.
[1325–75; Middle English ydre < Middle French < Latin < Greek hýdrā water serpent; compare otter]

hy·dra

(hī′drə)
Any of several small freshwater polyps having a simple cylindrical body with a mouth-like opening surrounded by tentacles. The young develop from eggs or from buds.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hydra - (Greek mythology) monster with nine headsHydra - (Greek mythology) monster with nine heads; when struck off each head was replaced by two new ones; "Hydra was slain by Hercules"
Greek mythology - the mythology of the ancient Greeks
mythical creature, mythical monster - a monster renowned in folklore and myth
2.Hydra - a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer
3.hydra - trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality; "we may be facing a hydra that defies any easy solution"
trouble, problem - a source of difficulty; "one trouble after another delayed the job"; "what's the problem?"
4.hydra - small tubular solitary freshwater hydrozoan polyp
hydroid, hydrozoan - colonial coelenterates having the polyp phase dominant
genus Hydra - hydras
Translations
Wasserschlange
Hydrahydre

hydra

[ˈhaɪdrə] N (hydras or hydrae (pl)) [ˈhaɪdriː]hidra f
Hydra (Myth) → Hidra f

hydra

n (Zool, Myth) → Hydra f
References in periodicals archive ?
At 10 million years of age, TW Hydrae fit the bill.
4 cm lie within the disk that surrounds TW Hydrae, Wilner and his colleagues report in the June 20 Astrophhisical JournaI Letters.
Indeed, astronomers exploring the closest of these star groups, dubbed the TW Hydrae association, unveiled an image 2 years ago that may be a baby planet (SN: 1/9/99, p.
For instance, if a faint dot of light in the TW Hydrae association really is a planet, it should move in 1 year a distance roughly equal to one-thirty-thousandth the width of the full moon on the sky, says Schneider.