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semi·crys·tal·line | \ ˌse-mē-ˈkri-stə-lən 
, ˌse-ˌmī-, -mi- \
, ˌse-ˌmī-, -mi- \Definition of semicrystalline
: incompletely or imperfectly crystalline
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Time Traveler for semicrystalline
The first known use of semicrystalline was in 1816
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