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Also available:
World English Dictionary
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oak apple
oak ap·ple
(
plural
oak ap·ples
)
noun
Definition:
growth on oak tree:
a rounded hollow growth on the trunk of an oak tree caused by infestation with gall wasps, which use the growths as shelters for their larvae
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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