流りゅう蛍けい

noun

flying firefly

A formal or literary term for a firefly in flight, evoking a poetic image of light drifting through the air.

• 夏なつの夜よる、流りゅう蛍けいが川かわ面もをかすめて飛とんでいた。

  On a summer night, flying fireflies skimmed over the river surface.