英语词汇“hydra”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

hydra1

/ˈhʌɪdrə

noun

A minute freshwater coelenterate with a stalk-like tubular body and a ring of tentacles around the mouth.

Genus Hydra, class Hydrozoa.

The Phylum Cnidaria includes such diverse forms as jellyfish, hydra, sea anemones, and corals....

The same is true for hydra, a freshwater cnidarian.
There are some animals that don't belong to the Bilateria, though: members of the phylum Cnidaria, the jellyfish, hydra, sea anemones, and corals, which are typically radially symmetric.

Origin

Via Latin from Greek hudra 'water snake' (see Hydra), named by Linnaeus because, if cut into pieces, each section can grow into a whole animal.

Hydra2

/ˈhʌɪdrə

1 Greek Mythology A many-headed snake whose heads grew again as they were cut off, eventually killed by Hercules.

1.1 (as noun hydra) A thing which is hard to overcome or resist because of its pervasive or enduring quality or its many aspects: his battle with the hydra of bureaucracy...

Database scalability is a many-headed hydra that's hard to define, let alone tame.
Yet it appears that multi-headed hydra, our scientific research establishment, is pulling in more than 200 different directions.
We might have to strike back at some heads on this terrorist hydra, try not to slaughter innocents, and swallow the collateral damage.

2 Astronomy The largest constellation (the Water Snake or Sea Monster), said to represent the beast slain by Hercules. Its few bright stars are close to the celestial equator. Compare with Hydrus.

Origin

Via Latin from Greek hudra.

单词	hydra
释义	hydra1 /ˈhʌɪdrə / noun A minute freshwater coelenterate with a stalk-like tubular body and a ring of tentacles around the mouth. Genus Hydra, class Hydrozoa. The Phylum Cnidaria includes such diverse forms as jellyfish, hydra, sea anemones, and corals.... The same is true for hydra, a freshwater cnidarian. There are some animals that don't belong to the Bilateria, though: members of the phylum Cnidaria, the jellyfish, hydra, sea anemones, and corals, which are typically radially symmetric. Origin Via Latin from Greek hudra 'water snake' (see Hydra), named by Linnaeus because, if cut into pieces, each section can grow into a whole animal. Hydra2 /ˈhʌɪdrə / 1 Greek Mythology A many-headed snake whose heads grew again as they were cut off, eventually killed by Hercules. 1.1 (as noun hydra) A thing which is hard to overcome or resist because of its pervasive or enduring quality or its many aspects: his battle with the hydra of bureaucracy... Database scalability is a many-headed hydra that's hard to define, let alone tame. Yet it appears that multi-headed hydra, our scientific research establishment, is pulling in more than 200 different directions. We might have to strike back at some heads on this terrorist hydra, try not to slaughter innocents, and swallow the collateral damage. 2 Astronomy The largest constellation (the Water Snake or Sea Monster), said to represent the beast slain by Hercules. Its few bright stars are close to the celestial equator. Compare with Hydrus. Origin Via Latin from Greek hudra.
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