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second wind
Second World War
secondary
secondary accent
secondary battery
secondary boycott
secondary cell
secondary color
secondary electron
secondary emission
secondary infection
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secondary modern school
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secondary electron
sec·ond·ar·y e·lec·tron (plural sec·ond·ar·y e·lec·trons)


noun 
Definition:
 
electron released by secondary emission: an electron released by secondary emission
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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