balsam of To·lu noun \-tə-ˈlü\
: a balsam from a tropical American leguminous tree (Myroxylon balsamum) used especially as an expectorant and as a flavoring for cough syrups—called also tolu, tolu balsam
Seen & Heard
What made you want to look up balsam of Tolu? Please tell us where you read or heard it (including the quote, if possible).