Etymology
Learned borrowing from Latin plēbiscītum, plēbis scītum, plēbī scītum (“law of the common people or plebs”), from plēbis (the genitive singular of plēbs (“common people, plebeians”), ultimately from Proto-Indo-European *pleh₁- (“to fill”)) + scītum (“decree, ordinance, statute”) (from scīscō (“to ascertain; to know; to decree, enact, ordain”) (from sciō (“to know; to understand”), ultimately from Proto-Indo-European *skey- (“to dissect; to split”)) + -scō (suffix meaning ‘to begin [doing something]’)) + -tum (suffix forming action nouns from verbs)).