Lewis & Short

Phase, n. indecl.,

  1. I. the Passover, a Jewish feast commemorative of the rescue of the first-born among the Jews from the destruction which visited the Egyptians: est enim Phase (id est transitus) Domini, Vulg. Exod. 12, 11: factum est Phase, id. 4 Reg. 23, 22.
  2. II. Transf., the sacrifice offered at the Passover, the paschal lamb: immolare, Vulg. 2 Par. 35, 11; id. Deut. 16, 2.