zon-
combining form 
or zono-
Etymology: Greek zōn-, zōno-, from zōnē — more at zone 
1. : girdle : belt : band 
< Zonites >
< Zonochlorite >
2. : zone : zonal 
< zoniferous >
< zonoplacental >
or zono-
1.
< Zonites >
< Zonochlorite >
2.
< zoniferous >
< zonoplacental >