Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
plēbiscītum (also separately plēbi scītum, Plaut. Ps. 2, 4, 58), i. n. (abl. plebis scitu, Decret. ap. Cic. Att. 4, 2, 3) [plebs-scitum], a decree or ordinance of the people (opp.: senatus consultum), Cic. Dom. 17, 44; Just. Inst. 1, 2, 4: plebis scitum igitur est secundum eum Capitonem lex quam plebes, non populus, accipit, Gell. 10, 20, 6; cf. plebs, I., and scitum, s. v. scisco, P. a.