LSJ
ον, ingenious in argument, sophistical, Corn. ND 31; Sup., D.L. 4.37. — εὑρησι- is freq. in Pap. in this group of words, e.g. PRein. 14.23, 15.21 (ii BC), Phld. Rh. 1.207 S., etc. ; εὑρεσι- first in Pap. of iv AD, POxy. 71 i 9 (corr. fr. εὑρησι-), PMasp. 153.32 (vi AD), etc., f.l. in Plb. 18.46.3, Ph. ll. cc. (εὑρησ- v.l. 1.628), etc.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)