focal area
noun Linguistics.
(in dialect geography) an area whose dialect has exerted influence on the dialects of surrounding areas, as reflected in a set of isoglosses more or less concentrically surrounding it.
Compare
relic area,
transition area.
Words nearby focal area
fobs,
foc,
focaccia,
focal,
focal amyloidosis,
focal area,
focal depth,
focal distance,
focal epilepsy,
focal glomerulonephritis,
focal infection