thumbtack

/θˈʌmbtæk/

Thumbtack

a short pin with a flat round head that is used to fasten paper to a wall or board

to thumbtack

MAIN VERB

fasten with thumbtacks

Examples

1. Take this thumbtack.

2. Push one thumbtack into the opposite side of the hoops.

3. - You wouldn't put thumbtacks on a peanut butter sandwich.

4. Other aquatic insects like water treaders exploit surface tension, just like thumbtacks and paper clips.