dictum

Definition from Nolo’s Plain-English Law Dictionary

A remark, statement, or observation of a judge that is not a necessary part of the legal reasoning needed to reach the decision in a case. Although dictum may be cited in a legal argument, it is not binding as legal precedent, meaning that other courts are not required to accept it. Dictum is an abbreviation of the Latin phrase "obiter dictum," which means a remark by the way, or an aside.

Definition provided by Nolo’s Plain-English Law Dictionary.