資料來源 : pyDict

三字銘,三線形,象

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

Trigram \Tri"gram\, n. [Pref. tri- + -gram.]
   Same as {Trigraph}.

資料來源 : WordNet®

trigram
     n : a word that is written with three letters in an alphabetic
         writing system