He will practice against thee by poison.
Shak.
4. To apply theoretical science or knowledge, esp. by way of
experiment; to exercise or pursue an employment or profession, esp.
that of medicine or of law.
[I am] little inclined to practice on others, and as little that
others should practice on me.
Sir W. Temple.
Prac"ticed (?), a. [Often written practised.] 1. Experienced; expert;
skilled; as, a practiced marksman. "A practiced picklock." Ld. Lytton.