As a Noun
1. SEROTONIN is a chemical produced naturally in your brain that affects the way you feel, for example making you feel happier, calmer, or less hungry.
1. There appears to be no commonly used Auslan sign for SEROTONIN. If you know a sign for SEROTONIN used by you or other Auslan users (deaf people or interpreters) please go to "report missing sign" and supply details. Thank you.