principium

prin·cip·i·um

P0563800 (prĭn-sĭp′ē-əm)n. pl. prin·cip·i·a (-ē-ə) A principle, especially a basic one.
[Latin prīncipium; see principle.]

principium

(prɪnˈsɪpɪəm) n, pl -ia (-ɪə) (usually plural) a principle, esp a fundamental one[C17: Latin: an origin, beginning]

prin•cip•i•um

(prɪnˈsɪp i əm)

n., pl. -cip•i•a (-ˈsɪp i ə) a basic principle. [1575–85; < Latin prīncipium founding, beginning, principle]