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

Propaedeutic \Pro`p[ae]*deu"tic\, Propaedeutical
\Pro`p[ae]*deu"tic*al\, a. [Gr. ? to teach beforehand; ? before
   + ? to bring up a child, to educate, teach, fr. ?, ?, a
   child.]
   Of, pertaining to, or conveying, preliminary instruction;
   introductory to any art or science; instructing beforehand.