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tri-county
tri-county n. and adj. 
/ˈtrʌɪkaʊnti/, /ˈtraɪˌkaʊn(t)i/
Brit. /(ˌ)trʌɪˈkaʊnti/
, /(ˌ)trʌɪˈkaʊnti//ˈtrʌɪkaʊnti/U.S. /ˌtraɪˈkaʊn(t)i/
, /ˌtraɪˈkaʊn(t)i//ˈtraɪˌkaʊn(t)i/ΘΚΠ
society > authority > rule or government > territorial jurisdiction or areas subject to > an administrative division of territory > [adjective] > relating to a county > to three counties
tri-county1974
1974 News & Courier (Charleston, S. Carolina) 19 Apr. 6- a/1 A municipal scramble for federal recreation funds is under way in the tri-county.
1978 Detroit Free Press 5 Mar. 13/2 These centers cater to some 150,000 deaf adults in the tri-county area.
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