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non-systematic
non-systematic adj.
Brit. 
/ˌnɒnsɪstᵻˈmatɪk/
, /ˌnɒnsɪstᵻˈmatɪk/U.S. /ˌnɑnˌsɪstəˈmædɪk/
/ˌnɑnˌsɪstəˈmædɪk/ΚΠ
1892 Publ. Amer. Statist. Assoc. 3 264 The subsidiary and non-systematic application of numbers.
1993 Jrnl. Petrol. 34 622 Interactions between blobs beneath an island can result in complex, non-systematic patterns, as are observed on some of the Canary Islands.
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