The phrase "model nomenclature" refers to the way that products or things are named or labeled by a company or manufacturer. It helps to distinguish between different models or versions of the same thing. Full definition
Two new engines bring more power and new model nomenclature. (cars.com)
After a year hiatus, the 2014 Audi R8 returns with revised model nomenclature, a mild face - lift, weight - saving measures and, best of all, a new automated manual transmission that provides a more legitimate automatic - transmission option for customers who want it. (autoweek.com)
Ford's model nomenclature runs S, SE, SEL (or SES), from low to high. (geek.com)