From Wiktionary, the free dictionary
From ultra- + slim.
ultraslim (not comparable)
- Extremely slim
2008 March 13, Danielle Belopotosky, “Solid-State Drives, the Costly Innards of Slim Laptops”, in New York Times[1]:[…] Lenovo was putting its solid-state drives into its ultraslim ThinkPad X300 laptop.
