Placard
![](https://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Skull_and_Crossbones.svg/300px-Skull_and_Crossbones.svg.png)
The skull and crossbones sign is a well-known symbol for poison
A placard is a sign made to inform people about something. Often, they are used to warn about danger. Very often, hazard symbols (special pictograms) are used.
Sometimes, placard is also used to mean a leaflet that shows how a certain machine should be operated.