资料来源 : Webster's Revised Unabridged Dictionary (1913)

Etacism \E"ta*cism\, n. [Gr. ? the letter ?, ?. Cf. {Itacism}.]
   (Greek Gram.)
   The pronunciation of the Greek [eta] (eta) like the Italian e
   long, that is like a in the English word ate. See {Itacism}.