Basic Guidelines For English Spellings
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Designating a type of fossilized resin found in London Clay strata.
The resin was originally found in 1811–12 during excavations for a tunnel at Highgate Hill in Middlesex (now in north London).
Early 19th century; earliest use found in Thomas Thomson (1773–1852), chemist. From the name of HighgateHill in Middlesex (now in north London).