The "comma johanneum" is a disputed clause found in verse 5:7 of the First Epistle of John in the New Testament. Some scholars argue that the clause, which speaks of the Father, the Word, and the Holy Spirit being one, was added later and is not original. Other possible synonyms for the "comma johanneum" include the "Johannine Comma" and the "comma of Jerome," referencing the early church father who is known to have argued against the inclusion of the clause in the biblical text. Regardless of the terminology used, the debate around the authenticity of the "comma johanneum" remains an interesting topic of discussion among biblical scholars.