資料來源 : Webster's Revised Unabridged Dictionary (1913)

Arsmetrike \Ars`met"rike\ ([aum]rz`m[e^]t"r[i^]k), n. [An
   erroneous form of arithmetic, as if from L. ars metrica the
   measuring art.]
   Arithmetic. [Obs.] --Chaucer.