polycrystalline

[pol-ee-kris-tl-in, -ahyn, -een]

pol·y·crys·tal·line

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

Origin:
1920–25; poly- + crystalline
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Polycrystalline has a plethora of syllables.
So is pneumonoultramicroscopicsilicovolcanoconiosis. Does it mean:
an obscure term ostensibly referring to a lung disease caused by silica dust, sometimes cited as one of the longest words in the English language.
opposition to the withdrawal of state support or recognition from an established church, esp. the Anglican Church in 19th-century England.
WordNet
polycrystalline

adjective
composed of aggregates of crystals; "polycrystalline metals" 
WordNet® 3.0, © 2006 by Princeton University.
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