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attainment
attainment area
attainment target
attaint
attap
attapulgite
attar
attempt
attend
attend to
attendance
attendance allowance
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attention span
at·ten·tion span (plural at·ten·tion spans)


noun 
Definition:
 
limits of concentration: the length of time that somebody can concentrate effectively on a task or activity
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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