Online collaborative environment - a definition?

We are continuing to use our online collaborative environment web conferencing platform for staff training and training staff to use it.  One thing that we've not yet managed to do is define it.  We are using an Adobe Connect customised solution called Mizaru - sometimes we refer to it by name i.e. Mizaru or Adobe Connect, sometimes we call it web conferencing, sometimes an online collaborative tool or platform or environment, sometimes a virtual classroom but we haven't settled on a definitive term.  I don't know whether there is one? I tend to call it different things depending on the audience and depending how much experience they have of working or teaching or facilitating online.  Ideally I would like to call it a 'real time online facilitated sharing collaborative learning environment' but that may be a little long winded......