(idiomatic, literary) The physical aspect of urbanism, emphasizing building types, thoroughfares, open space, frontages, and streetscapes but excluding environmental, functional, economic and sociocultural aspects.

A condition of hyperdensity, limited but enabling scale of communicative possibilities that converge opportunistically. It occurs when the pressure of an urban environment reaches a critical threshold in cities of developing countries.

An interchange between a highway (free-flowing) and a street (with traffic signals) which allows traffic to proceed from either direction on each road to either direction on the other, and which is governed by only one set of traffic signals.

(zoology) A structure that is located ventral to the anus in female pigs.

plural of uracil

A widely circulated story, often believed to be true by the teller, but usually distorted, exaggerated or fabricated for sensational effect, and often having elements of humour or horror.

(nuclear physics) Enriched uranium with at least 2% but less than 20% uranium-235, enough to sustain a nuclear fission chain reaction in a nuclear reactor moderated by light water but not enough to allow a self-sustaining fission chain reaction without a moderator; used as the main nuclear fuel in most commercial nuclear reactors used to generate electricity.

(US, Canada) A division of property owned by a First Nations community within an urban area.

plural of urban planning

plural of urban sprawl