Conurbation
A conurbation is an urban area that includes a number of cities, towns and villages which, through population growth and expansion, have physically merged to form one continuous built up area. It is a sort of agglomeration.
A metropolitan area usually combines one or several conurbations.
Conurbation Media
A map of the large conurbation area of Helsinki (in yellow) in Uusimaa, Finland
Satellite photo from 2012 showing Sydney in the centre, with Wollongong visible on the left and the Central Coast on the right
Nocturnal view of the New York City metropolitan area, the world's most brightly illuminated conurbation and largest urban landmass Long Island extends 120 miles eastward from Manhattan, the central core of the conurbation.