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apochromat
a·po·chro·mat [ àppə krṓmət ] (plural a·po·chro·mats)


noun 
Definition:
 
lens without chromatic aberration: a lens that is corrected for chromatic aberration by incorporating different types of glass
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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