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non-structural
non-structural adj. 
/(ˌ)nɒnˈstrʌtʃ(ə)rl̩/,
Brit. /(ˌ)nɒnˈstrʌtʃ(ə)rəl/
, /(ˌ)nɒnˈstrʌtʃ(ə)rəl//(ˌ)nɒnˈstrʌtʃ(ə)rl̩/U.S. /ˌnɑnˈstrək(t)ʃ(ə)rəl/
/ˌnɑnˈstrək(t)ʃ(ə)rəl/ΚΠ
1879 J. M. Ross Globe Encycl. V. 199/2 It is only a matter of convenience to treat of bricks..as building materials, and include only among pottery vessels non-structural substances and ornamental ware.
1921 Mod. Lang. Notes 36 191 The (Alexandrian) amphibrach is one of these non-structural [metrical] forms.
2000 L. Crane Ninth Day of Creation 349 Since the transmembrane segment was missing, the protein had to be a non-structural one.
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