Origin and Etymology of theriaca
New Latin, from Latin, antidote against poison — more at treacle
First Known Use: 1562
Medical Definition of theriaca
: an antidote to poison consisting typically of about 70 drugs pulverized and reduced with honey to an electuary—called also Venice treacle
Seen and Heard
What made you want to look up theriaca? Please tell us where you read or heard it (including the quote, if possible).