Stands for "Virtual Reality Modeling Language." If you think this has something to do with HTML, you're right. HTML (hyper-test markup language) is the format for Web page navigation. VRML, created by the smart people at Silicon Graphics and Intervista Software, is a 3D navigation specification, which enables the creation of 3D web sites.
VRML
Meaning of VRML in English
English glossary of computer and Internet terms. Английский глоссарий компьютерных и Интернет терминов. 2012