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macadam
Definitions
[məˈkadəm], (Noun)
Definitions:
- broken stone of even size, bound with tar or bitumen and used in successively compacted layers for surfacing roads and paths
Phrases:
Origin
:
early 19th century: named after John L. McAdam (1756–1836), the British surveyor who advocated using this material
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definition by Oxford Dictionaries