Jisho

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Noun
1. Hydra (constellation); the Sea SerpentAstronomy
Wikipedia definition
2. Hydra (constellation)Hydra is the largest of the 88 modern constellations, measuring 1303 square degrees. It has a long history, having been included among the 48 constellations listed by the 2nd century astronomer Ptolemy. It is commonly represented as a water snake. It should not be confused with the similarly named constellation of Hydrus.
Read “Hydra (constellation)” on English Wikipedia
Read “うみへび座” on Japanese Wikipedia
Read “Hydra (constellation)” on DBpedia
Other forms
うみへび座 【うみへびざ】

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