> as lemmas
non-optimal
non-optimal adj.
Brit. 
/(ˌ)nɒnˈɒptᵻml/
, /(ˌ)nɒnˈɒptᵻml/U.S. /ˌnɑnˈɑptəm(ə)l/
/ˌnɑnˈɑptəm(ə)l/ΚΠ
1920 Science 31 Dec. 616/2 High temperatures and therefore non-optimal conditions of growth.
1975 Language 51 528 Much in language is non-optimal for purposes of communicating cognitive information.
1998 Water & Waste Treatm. June 20/2 Incomplete understanding of these flows can result in non-optimal designs, inefficient operation and reduced reliability.
<
as lemmas