different between hydra vs obelia

English

Wikispecies

Etymology

After the Hydra, from Greek mythology, which grew two new heads every time one of its heads was cut off. The first sense alludes to the budding method of asexual reproduction that the hydra practices, similar to growing new heads. The second sense refers to how the creature could not be killed by a swift, decisive solution (in contrast to a Gordian knot).

Pronunciation

• enPR: h?'dr?, IPA^(key): /?ha?d??/

Noun

hydra (plural hydras or hydrae or hydræ)

1. Any of several small freshwater polyps of the genus Hydra and related genera, having a naked cylindrical body and an oral opening surrounded by tentacles.
2. (fantasy) A dragon-like creature with many heads and the ability to regrow them when maimed.
3. A complex, multifarious problem or situation that cannot be solved easily and rapidly.
   • 2009, Kris Frieswick, Till Death Do Us Pay:

     Because the statute is so vaguely worded, award decisions are habitually based on case law, the growing mountain of which is a hydra of rulings that point in so many directions that almost any decision can be defended or overturned on appeal, depending on how smart your lawyer is and which precedent he selects to argue your case.

Translations

Anagrams

• Hardy, hardy

Czech

Etymology

From Ancient Greek ???? (húdra).

Pronunciation

• IPA^(key): [???dra]
• Rhymes: -?dra
• Hyphenation: hyd?ra

Noun

hydra f

1. (Greek mythology, Roman mythology, singular only) Hydra, a mythological serpent with seven heads
2. something monstrous which is extremely difficult to fight with (often connected with organized crime)
3. Hydra, a genus of hydrozoan in family Hydridae

Declension

Alternative forms

• (serpent): Hydra

Synonyms

• (genus Hydra): nezmar

Hypernyms

• (genus Hydra): živo?ichové – regnum; žahavci – phylum; polypovci – class; nezma?i – order; nezmarovití – family

Hyponyms

• (genus Hydra): nezmar hv?zdnatý, nezmar obecný, nezmar opásaný, nezmar ostropouzdrý, nezmar podélník, nezmar štíhlý, nezmar zelený

Related terms

• See hydro-

Further reading

• hydra in P?íru?ní slovník jazyka ?eského, 1935–1957
• hydra in Slovník spisovného jazyka ?eského, 1960–1971, 1989

Anagrams

• drahý
• dráhy
• hadry
• hrady

Latin

Etymology

From Ancient Greek ???? (húdra).

Pronunciation

• (Classical) IPA^(key): /?hy.dra/, [?h?d??ä]
• (Ecclesiastical) IPA^(key): /?i.dra/, [?i?d???]

Noun

hydra f (genitive hydrae); first declension (masculine hydrus)

1. A water-snake.

Declension

First-declension noun.

Related terms

• Hydra
• hydrus

References

• hydra in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
• hydra in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition, 1883–1887)
• hydra in The Perseus Project (1999) Perseus Encyclopedia?^[3]
• hydra in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
• hydra in William Smith, editor (1854, 1857) A Dictionary of Greek and Roman Geography, volume 1 & 2, London: Walton and Maberly

English

Wikispecies

Etymology

From Ancient Greek ?????? (obelía, “a round cake”).

Noun

obelia (plural obelias)

1. (zoology) Any of various colonial marine hydroids of the genus Obelia.
   • 1970, Marie M. Jenkins, Animals Without Parents, page 55,

     All the polyps and branches of obelias are supported and protected by a thin, transparent, horny covering which is made by the outer layer of cells. About each polyp the horny covering is in the shape of a goblet or cup.

   • 1975, Jacques Cousteau, The Ocean World of Jacques Cousteau: The Act of Life, page 42,

     Fragile but menacing, obelias are colonies ranging from one to eight inches in length which grow on seaweeds, rocks, and piles. The medusa, only one stage in the obelia’s life cycle, has anywhere from eight to 24 tentacles, […] .

   • 1999, Martin Walters, Jinny Johnson, The World of Animals, 2011, page 31,

     […] some [hydroids], like obelias, live in stalked colonies […] .