Pons Asinorum

ponz as-i-no'rum, Latin for the Bridge of Asses. In the English grammar school the term is applied to the fifth proposition of the first book of Euclid's Geometry, namely: That if a triangle has two equal sides, the angles opposite those sides are also equal. It was considered that dull students would show their inferiority by holding back at this proposition, as asses do when led over a bridge. See Euclid; Geometry