The Collaborative International Dictionary
Counterchecking
Countercheck \Coun`ter*check"\ (koun`t?r-ch?k"), v. t. [imp. & p. p. Counterchecked (-ch?ckt"); p. pr. & vb. n. Counterchecking.] To oppose or check by some obstacle; to check by a return check.
Wiktionary
counterchecking
vb. (present participle of countercheck English)