tàn​tóu

peek

探头 (探頭) tàn​tóu
peek verb
to stick one's head out or pop it in (e.g., from a window or door) to look at something

He peered inside through the crack in the door.

sensor noun
a physical probe or sensing device

The sensitivity of this probe is very high.

Frequency

Movie subtitles
1.04 per million appears in 0% of films
Written text
4.11 per million

Sources

Definitions
CC-CEDICT