>I just checked the definition of "relativistic mass" in the same wikipedia, and it seems that the notion is not very popular amongst modern scientists. But the article also explains that it is more a matter of semantics.

This is what it says:

"Today, when physicists talk about the mass of an object they always mean the rest mass."

Its not a matter of semantics per se, its a matter of mathematical definitions. The mathematical defintiion of mass does not change with velocity.