Definition of pons asinorum
: a critical test of ability or understanding; also : stumbling block
Origin and Etymology of pons asinorum
New Latin, literally, asses' bridge, name applied to the proposition that the base angles of an isosceles triangle are equal
First Known Use: 1751
Seen and Heard
What made you want to look up pons asinorum? Please tell us where you read or heard it (including the quote, if possible).