> as lemmas
ultra-clean
ultra-clean adj.
Brit. 
/ˌʌltrəˈkliːn/
, /ˌʌltrəˈkliːn/U.S. /ˌəltrəˈklin/
/ˌəltrəˈklin/ΚΠ
1970 Sci. Jrnl. Apr. 42 Cleaning these parts is a major branch of ultraclean technology involving the application of special solvents, the use of ‘sonication’—ultrasonic vibration—to jar the dirt loose,..and many other highly specialized procedures.
<
as lemmas