Etymology
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Papuan (n.)

1814 in reference to the race that inhabits New Guinea (the large island north of Australia); earlier simply Papua (1610s), from Malay (Austronesian) papuah "frizzled." As an adjective by 1869.

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lemony (adj.)

"resembling or infused with lemon," 1846, from lemon (n.1) + -y (2). In Australia/New Zealand slang, also "irritated, angry" (1941). An earlier adjective was lemonish (1719).

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ZIP (adj.)

1963, in U.S. postal ZIP code, an acronym for Zone Improvement Plan, no doubt chosen with conscious echo of zip (v.1). Alternative post code is attested by 1967 in Australia.

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poisoner (n.)

"one who poisons or corrupts," late 14c., poisonere, agent noun from poison (v.). OED notes that in Australia and New Zealand it was used for "A cook, esp. for large numbers" (1905).

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botany (n.)

"the science of plants," 1690s, from botanic. The -y is from astronomy, etc. Botany Bay in Australia was named by Captain Cook (1770) on account of the great variety of plants found there; later it was a convict settlement (1778).

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kangaroo (n.)

"large marsupial mammal of Australia," 1770, used by Capt. Cook and botanist Joseph Banks (who first reported the species to Europeans), supposedly representing a native word from northeast Queensland, Australia, but often said to be unknown now in any native language. However, according to Australian linguist R.M.W. Dixon ("The Languages of Australia," Cambridge, 1980), the word probably is from Guugu Yimidhirr (Endeavour River-area Aborigine language) /gaNurru/ "large black kangaroo."

In 1898 the pioneer ethnologist W.E. Roth wrote a letter to the Australasian pointing out that gang-oo-roo did mean 'kangaroo' in Guugu Yimidhirr, but this newspaper correspondence went unnoticed by lexicographers. Finally the observations of Cook and Roth were confirmed when in 1972 the anthropologist John Haviland began intensive study of Guugu Yimidhirr and again recorded /gaNurru/. [Dixon]

Kangaroo court is American English, first recorded 1850 in a Southwestern context (also mustang court), from notion of proceeding by leaps.

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macadamia (n.)

Australian evergreen tree, commercially important for its edible nut, 1904, from Modern Latin (1858), named for Scotland-born chemist Dr. John Macadam, secretary of the Victoria Philosophical Institute, Australia, + abstract noun ending -ia.

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eucalyptus (n.)

evergreen genus of Australia, 1789, from Modern Latin, coined 1788 by French botanist Charles Louis L'héritier de Brutelle (1746-1800) from Greek eu "well" (see eu-) + kalyptos "covered" (from PIE root *kel- (1) "to cover, conceal, save"); so called for the covering on the bud.

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common (n.)
Origin and meaning of common

c. 1300, "a fellowship or brotherhood; early 14c., "people of a community or town, freemen, citizenry;" late 15c., "land held in common," from Old French commune and Medieval Latin communia, and partly from common (adj.). Also compare commons. Latin communis "common, general" (adj.) also served as a noun meaning "common property; state, commonwealth."

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Oz 

mythical land in L. Frank Baum's "The Wonderful Wizard of Oz" (1900) and sequels; according to an anecdote written by Baum in 1903, inspired by a three-drawer desktop cabinet letter file, the last drawer labeled O-Z. As Australian slang for "Australia," attested by 1983.

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