/ˈreɪ.di.ə.sɪz/
NOUN
Lines extending from the center of a circle or sphere to its boundary, or the lengths of those lines.
Measurements or distances associated with the outer boundaries, circumferences, and dimensions of circular or spherical objects.
NOUN
The extent, range, or surrounding area measured or considered from a particular center or location.
The surrounding areas or geographical ranges within which activities, services, or particular conditions extend.