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plane geometry
plane sailing
plane table
plane tree
planeload
planer
planer tree
planet
planet wheel
planetar
planetarium
planetary
planetary gear
planetary nebula
planetesimal
planetoid
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planet wheel
plan·et wheel (plural plan·et wheels)


noun 
Definition:
 
gear wheel rotating around another: a wheel in an epicyclic gear system that rotates around the wheel with which it meshes
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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