Biological process

GO:0051774

down regulation of nitric-oxide synthase biosynthetic process, down-regulation of nitric-oxide synthase biosynthetic process, downregulation of nitric-oxide synthase biosynthetic process, negative regulation of NO synthase biosynthesis, negative regulation of NO synthase biosynthetic process, negative regulation of NOS biosynthesis, negative regulation of NOS biosynthetic process

Any process that stops, prevents, or reduces the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of a nitric-oxide synthase enzyme.