Jastrow: סֶרֶךְ

סֶרֶךְ m. (preced.) clinging to, following the example of; habit. Nidd. 67ᵇ משום ס׳ בתה because her daughter might follow her example (and make the mother’s exceptional act a rule for all occasions). Ḥull. 106ᵃ נטילת … משום ס׳ תרומה the washing of hands before a meal on secular food was introduced for the sake of uniformity with T’rumah (to make it a habit). Y. Yoma III, 40ᵇ bot., sq. טבילת ס׳ an immersion required merely for the sake of uniformity; Bab. ib. 30ᵃ ס׳ טבילה. Y. Bicc. III, 64ᵈ bot.; Y. Ḥag. II, 78ᵇ נטילת ס׳ washing of hands (before meals) for the sake of uniformity (v. supra).