lightningbug
nounUK /ˈlaɪt.nɪŋ.bʌɡ/
US /ˈlaɪt.nɪŋ.bʌɡ/
A lightningbug is a small flying bug that makes a little light at night.
We caught a lightningbug in a jar and watched it glow.
OTHER MEANINGS
2. A person who brings a bright idea or energy to a group.
Our new teammate is a real lightningbug, always full of bright ideas.
3. A small light used for decoration or safety.
He clipped a little lightningbug to his bike so cars could see him.
4. A nickname for something that flashes on and off quickly.
The old sign was a lightningbug, blinking all night long.