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sinoatrial node
Sinology
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sinkerball
sink·er·ball [ síngkər bàwl ] (plural sink·er·balls)


noun 
Definition:
 
fastball that drops sharply: a fastball that drops sharply before crossing the home plate because it is thrown with a downward and inward roll of the wrist
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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