• (a.) Belonging to the same zone; as, tautozonal planes.
Tau`to·zon'al adjective [ Greek ...; ..., for ... ... the same + English zonal .] (Crystallog.) Belonging to the same zone; as, tautozonal planes. 
tautozonal Belonging to the same zone; as, 'tautozonal planes'. Related-word units meaning same: auto-; equ-; homeo-; homo-; iso-; pari-; peer-; syn-.