(graph theory) A graph derived from a given plane graph such that this derived graph has a vertex corresponding to each edge of the given graph, and such that for every “angle” (consecutive trio of...

The valley of the River Ogmore (Cwm Ogwr in Welsh) in Bridgend county borough, Wales. / A community (civil parish) in Bridgend county borough, named after the valley.

Zostera spp. in marine environments / Vallisneria spp. in freshwater environments.

A lightweight cover, usually made of fabric stretched on a metal frame which is readily removable, for the cockpit or deck of a speedboat or sailboat.