The scientific term for Aspirin. In many countries, notably Canada and Germany, "Aspirin" is a patented trademark of the local
Bayer subsidiaries. Any non-Bayer products are labelled with the abbreviation ASA (
Canadian English),
AAS (Canadian French), and ASS (German). I am not making the last one up!
The term Acetylsalicylic Acid, in its entirety, is rarely used in
layman's conversations.
Just as many people refer to any tissue as "Kleenex," Canadians often refer to non-Bayer
ASA as "generic
Aspirin" or, simply, "Aspirin."