Yes, sort of,
Vrms = the Root of the Mean of the Squares for a given time (usually one or more complete cycles). As you know, to find the mean or average you sum a number (T) of samples and then divide by T. The lower case ‘t’ represents an instant in time.
Rather than obtain an average of a finite number of samples, the above equation uses the more accurate method of integrating an infinite number of samples where the ‘dt’ represents the infinitely small interval between two points in time.