、。
Ethics refers to the standards of conduct.
Literal
Ethics [quotative-というのは], behavior [of-の] norm [object-を] means.
~というのは~(を)意味する is a formal definitional structure: 'X (which we call so) means Y.' Common in academic explanations. 倫理学 ('ethics, the study of ethics') — the ~学 suffix means 'field of study,' productive across many disciplines: 心理学 (psychology), 言語学 (linguistics), 経済学 (economics). 行動 ('behavior, conduct') + 規範 ('norm, standard').