VRML (Virtual Reality Modeling Language, pronounced vermal or by its initials, originally—before 1995—known as the Virtual Reality Markup Language) is a standard file format for representing 3-dimensional (3D) interactive vector graphics, designed particularly with the World Wide Web in mind. It has been superseded by X3D.
Read more about VRML: WRL File Format, Standardization, Emergence, Popularity, and Rival Technical Upgrade, Alternatives