noun
Hydra (constellation); the Sea Serpent
Astronomical term for the constellation Hydra, the largest constellation in the sky.
うみへび座は全天で最も大きな星座です。
Hydra is the largest constellation in the entire sky.
春の夜空でうみへび座を探してみましょう。
Let's look for Hydra in the spring night sky.
Compound of 海蛇 (umihebi, 'sea snake') + 座 (za, 'constellation'), a direct translation of the Latin name Hydra.