'Polyzonal' definitions:
Definition of 'Polyzonal'
From: GCIDE
- Polyzonal \Pol`y*zon"al\, a. [Poly- + zonal.] Consisting of many zones or rings. [1913 Webster]
- Polyzonal lens (Opt.), a lens made up of pieces arranged zones or rings, -- used in the lanterns of lighthouses. [1913 Webster]