You can refer to this list before naming that -copter https://en.wikipedia.org/wiki/IUPAC_numerical_multiplier https://en.wikipedia.org/wiki/IUPAC_numerical_mu

You can refer to this list before naming that -copter https://en.wikipedia.org/wiki/IUPAC_numerical_multiplier https://en.wikipedia.org/wiki/IUPAC_numerical_multiplier If enough of us are saying Tetracopter, it will stick.