lex siliaglossary / LEX SILIA lex Silia (leks sil-ee-[schwa]). [Latin] Roman law. A law providing for personal actions for a fixed sum of money; specif., a law from perhaps 250 B.C. introducing the legis actio per condictionem to claim a fixed sum of money. 词条贡献者 双语律师Nanda,国际知名法学院国际法专业,擅长翻译各类与生物医学诉讼相关的法律文件。