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subpool
subpool n.
Brit. 
/ˈsʌbpuːl/
, /ˈsʌbpuːl/U.S. /ˈsəbˌpul/
/ˈsəbˌpul/ΚΠ
1879 Internat. Rev. May 506 Aside from the general pool just described, sub-pools exist between the two St. Louis roads and between the lines which constitute the Chicago Division.
1881 Chicago Times 17 June Regarding the formation of a pool, the report..recommends three sub-pools.
2010 C. Wills Darwinian Tourist vi. 206 They are simply genetic accidents, the inevitable result of dividing a gene pool up into small subpools.
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