单词	Hydrus
释义	Hydrus /ˈhʌɪdrəs / Astronomy An inconspicuous southern constellation (the Water Snake), between the star Achernar and the south celestial pole. Compare with Hydra (sense 2). Origin Latin, from Greek hudros.
随便看	Ptolemaic Ptolemaic system Ptolemaic theory Ptolemaism Ptolemaist Ptolemean Ptolemy ptomaine ptomainic ptooey ptosis ptotic P-trap PTSD ptui Pty ptyalin ptyalism ptychodont ptygma ptygmatic ptygmatically p-type ptyxis Pu

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