Polycrystalline
[pol-ee-kris-tl-in, -ahyn, -een] /ˌpɒl iˈkrɪs tl ɪn, -ˌaɪn, -ˌin/
adjective
1.
(of a rock or metal) composed of aggregates of individual crystals.
2.
having or consisting of crystals that are variously oriented.
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