资料来源 : pyDict

歌词作者,剧本作者

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

Librettist \Li*bret"tist\ (l[i^]*br[e^]t"t[i^]st), n.
   One who makes a libretto.

资料来源 : WordNet®

librettist
     n : author of words to be set to music in an opera or operetta