Pons Asinorum Definition

pŏnz ăsə-nôrəm
A problem that severely tests the ability of an inexperienced person.
American Heritage
The fifth proposition of the first book of Euclid (that the base angles of an isosceles triangle are equal)
Webster's New World
Any problem hard for beginners.
Webster's New World

Origin of Pons Asinorum

  • New Latin pōns asinōrum bridge of fools (nickname of the Fifth Proposition in the Elements of Euclid, due to its difficulty) Latin pōns bridge Latin asinōrum genitive pl. of asinus ass, fool

    From American Heritage Dictionary of the English Language, 5th Edition

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