# How do you call multiple linear regression when it has an interaction term?

I'm writing a report and need to be precise but concise in the abstract. Currently I called it 'multiplicative multiple linear regression'. But when I Googled it, not much came up. In the same vein, I called multiple linear regression without the interaction term, additive multiple linear regression. But what is the official way to call it and be concise about it?

It is not a multiplicative model, which would be of the form $$y=\beta_0\beta_1^{x_1}\beta_2^{x_2}\epsilon.$$ Technically it is still a multiple regression model with an interaction term. (I think leaving out the "linear" is excusable in an abstract.)