also: ちくこう
phosphorescence; luminescence
Refers to materials that absorb light and then emit it slowly, often used in glow-in-the-dark products. Compare 夜光 (やこう), which can refer to any light emission at night, not necessarily from stored energy.
See also: 夜光
The dial of this watch uses phosphorescent paint.
Phosphorescent materials store light and glow in the dark.
Alternate reading; less common than ちくこう.
Compound of 蓄 (store, accumulate) and 光 (light), literally 'stored light'. The term is a modern technical coinage for phosphorescent materials.