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extra-regular
extra-regular adj.
Brit. 
/ˌɛkstrəˈrɛɡjᵿlə/
, /ˌɛkstrəˈrɛɡjᵿlə/U.S. /ˌɛkstrəˈrɛɡ(jə)lər/
outside of, or transgressing the rule; in addition to what is regular./ˌɛkstrəˈrɛɡ(jə)lər/ΚΠ
1649 Bp. J. Taylor Great Exemplar Pref. ⁋24 An extraregular..punishment.
1678 Lively Orac. ii. §53. 258 Men..set up new extraregular Courts of Justice.
1739 J. Trapp Righteous Over-much 35 These extra-regular Novelists.
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