noncrystalline

adjective
non·​crys·​tal·​line | \ ˌnän-ˈkri-stə-lən How to pronounce noncrystalline (audio) \

Definition of noncrystalline

: not composed of crystals : not crystalline noncrystalline silicone

First Known Use of noncrystalline

1851, in the meaning defined above

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The first known use of noncrystalline was in 1851

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