Page "Boomerang" Paragraph 9
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The origin of the term is uncertain, and many researchers have different theories on how the word entered the English vocabulary.
One source asserts that the term entered the language in 1827, adapted from an extinct Aboriginal language of New South Wales, Australia, but mentions a variant, wo-mur-rang, which it dates from 1798.
The boomerang was first encountered by western people at Farm Cove ( Port Jackson ), Australia, in December 1804 where its use as a weapon was witnessed during a tribal skirmish:
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