流りゅう星せい群ぐんりゅうせいぐんMeanings1nounmeteor shower; meteor swarmastronomy›Astronomy term for a group of meteors appearing to radiate from a single point; commonly used for annual events like the Perseids.今こん夜やはペルセウス座ざ流りゅう星せい群ぐんが