蛍

Selected Words with Definitions from WWWJDIC

• 蛍光灯 けいこうとう fluorescent lamp; person who is slow to react (n)
• 蛍光 けいこう fluorescence (n)
• 蛍 ほたる firefly (n)
• 蛍雪 けいせつ diligence in studying (e.g., continue to study even in such poor light as offered by a firefly or that reflected by snow) (n)