memorytrigger

noun
UK /ˈmeməri ˈtrɪɡə/
US /ˈmeməri ˈtrɪɡər/

Something that makes you suddenly remember a thing from the past.

The smell of cookies was a memorytrigger that took her back to her grandmother's kitchen.


OTHER MEANINGS

2. A smell, sound, or picture that brings back a strong feeling from long ago.

That old song is a memorytrigger for his school days.

3. A thing that helps you recall information you learned before.

The teacher used a colorful chart as a memorytrigger for the new words.

4. A small object kept to help someone remember a special event.

She kept the ticket as a memorytrigger of her first concert.