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optical character reader
optical character recognition
optical computer
optical disk
optical double star
optical fiber
optical glass
optical illusion
optical isomerism
optical mouse
optical rotation
optical scanner
optical semiconductor
optical sound
optical tweezers
optician
optics
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optimist
op·ti·mist [ óptəmist ] (plural op·ti·mists)


noun 
Definition:
 
1. somebody positive: somebody who tends to feel hopeful and positive about future outcomes
2. follower of optimism: a follower of a philosophical doctrine of optimism
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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