カイロ
カ
イ
ロ
Meanings
1
pocket heater; hand warmer; heater pack
usually written using kana alone
Refers to a small, portable heat source, typically a disposable chemical pack or reusable warmer, used to warm hands or body in cold weather.
On cold days, I keep a hand warmer in my pocket.
Disposable heater packs can be bought at convenience stores.