hotaru
1. firefly (Luciola cruciata); lightning bug
★ Common
Noun
#30841
1. firefly (Luciola cruciata); lightning bug
1. fluorescent lamp; fluorescent light
2. person who is slow to react; someone slow on the uptake
1. highlighter (pen)
1. glow of a firefly
2. nearly extinguished fire; embers
1. fluorescence
1. fluorite; fluorspar
1. diligence in studying (e.g. continuing to study even in such poor light as offered by a firefly or that reflected by snow); diligent study