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roorback
roost
rooster
root (1)
root (2)
root (3)
root ball
root beer
root canal
root cap
root cellar
root climber
root crop
root directory
root hair
root knot
root mean square
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root canal
root ca·nal (plural root ca·nals)


noun 
Definition:
 
1. pulp cavity of tooth: the cavity in the root of a tooth, containing pulp, nerves, and blood vessels
2. dental treatment: a dental treatment in which the diseased tissue in a root canal is removed and replaced with an inert material
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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